diff --git a/Providers/XCategoryProvider.cs b/Providers/XCategoryProvider.cs
index 29b2c92..8de96d8 100644
--- a/Providers/XCategoryProvider.cs
+++ b/Providers/XCategoryProvider.cs
@@ -19,6 +19,7 @@ using xDataService.Extensions;
 using xPushService.Constants;
 using xPushService.Providers;
 using xDataService.Configuration;
+using xDataService.Models;
 
 namespace xCategoryService.Providers
 {
@@ -29,13 +30,15 @@ namespace xCategoryService.Providers
         private readonly XDataServiceConfiguration dataServiceConfiguration;
         private readonly IXCategoryTitleResourceProvider titleResourceProvider;
         private readonly IXCategoryDescriptionResourceProvider descriptionResourceProvider;
+        private readonly IXCategorySubCategoryReferenceProvider categorySubCategoryReferenceProvider;
 
         public XCategoryProvider(
             XAppConfiguration appConfiguration,
             IXCategoryServiceProvider provider,
             XDataServiceConfiguration dataServiceConfiguration,
             IXCategoryTitleResourceProvider titleResourceProvider,
-            IXCategoryDescriptionResourceProvider descriptionResourceProvider
+            IXCategoryDescriptionResourceProvider descriptionResourceProvider,
+            IXCategorySubCategoryReferenceProvider categorySubCategoryReferenceProvider
         ) : base(
             provider,
             permittedRoles: new string[] { }
@@ -47,6 +50,7 @@ namespace xCategoryService.Providers
             this.titleResourceProvider = titleResourceProvider;
             this.dataServiceConfiguration = dataServiceConfiguration;
             this.descriptionResourceProvider = descriptionResourceProvider;
+            this.categorySubCategoryReferenceProvider = categorySubCategoryReferenceProvider;
         }
 
         //
@@ -849,7 +853,7 @@ namespace xCategoryService.Providers
                     //
                     // Descriptions ...
                     var updateDescriptions = result.Descriptions.Locales.Where(
-                        l => resource.Descriptions.Locales.Any(r => 
+                        l => resource.Descriptions.Locales.Any(r =>
                             r.Value
                                 .Equals(l.Value, StringComparison.InvariantCultureIgnoreCase) &&
                             r.Language
@@ -1179,5 +1183,261 @@ namespace xCategoryService.Providers
             return result;
         }
         #endregion
+
+        //
+        #region SubCategory References ...
+        /// <summary>
+        /// Get Specified Indexed Reference for Specific Provided ID ...
+        /// </summary>
+        /// <param name="providedForId"></param>
+        /// <param name="forIndex"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public async Task<XCategoryDto> GetReference(
+            int providedForId,
+            int forIndex = 0,
+            CancellationToken cancellationToken = default
+        )
+        {
+            //
+            var result = await categorySubCategoryReferenceProvider
+                .GetReference(
+                    forIndex: forIndex,
+                    providedForId: providedForId,
+                    cancellationToken: cancellationToken
+                );
+
+            //
+            return result;
+        }
+
+        /// <summary>
+        /// Retrieve all Exists References of Specific Provided ID ...
+        /// </summary>
+        /// <param name="providedForId"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public async Task<IEnumerable<XCategoryDto>> GetAllReferences(
+            int providedForId,
+            CancellationToken cancellationToken = default
+        )
+        {
+            //
+            var result = await categorySubCategoryReferenceProvider
+                .GetAllReferences(
+                    providedForId: providedForId,
+                    cancellationToken: cancellationToken
+                );
+
+            //
+            return result;
+        }
+
+        /// <summary>
+        /// Extract all Referencing Models for Specified Key ...
+        /// </summary>
+        /// <param name="providedForId"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns> 
+        public async Task<IEnumerable<XReference<int>>> GetAllReferencings(
+            int providedForId,
+            CancellationToken cancellationToken = default
+        )
+        {
+            //
+            var result = await categorySubCategoryReferenceProvider
+                .GetAllReferencings(
+                    providedForId: providedForId,
+                    cancellationToken: cancellationToken
+                );
+
+            //
+            return result;
+        }
+
+        /// <summary>
+        /// Count References ...
+        /// </summary>
+        /// <param name="providedForId"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public async Task<int> CountReferences(
+            int providedForId,
+            CancellationToken cancellationToken = default
+        )
+        {
+            //
+            var result = await categorySubCategoryReferenceProvider
+                .CountReferences(
+                    providedForId: providedForId,
+                    cancellationToken: cancellationToken
+                );
+
+            //
+            return result;
+        }
+
+        /// <summary>
+        /// Retrieve References of Specific Provided ID as Query ...
+        /// </summary>
+        /// <param name="query"></param>
+        /// <param name="providedForId"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public async Task<XQueryResult<XCategoryDto>> QueryReferences(
+            XQuery query,
+            int providedForId,
+            CancellationToken cancellationToken = default
+        )
+        {
+            //
+            var result = await categorySubCategoryReferenceProvider
+                .QueryReferences(
+                    query: query,
+                    providedForId: providedForId,
+                    cancellationToken: cancellationToken
+                );
+
+            //
+            return result;
+        }
+
+        /// <summary>
+        /// Add Reference a Model to Specific Provided ID ...
+        /// </summary>
+        /// <param name="model"></param>
+        /// <param name="providedForId"></param>
+        /// <param name="connectionId"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public async Task<bool> AddReference(
+            XCategoryDto model,
+            int providedForId,
+            string connectionId = null,
+            CancellationToken cancellationToken = default
+        )
+        {
+            //
+            var result = await categorySubCategoryReferenceProvider
+                .AddReference(
+                    model: model,
+                    connectionId: connectionId,
+                    providedForId: providedForId,
+                    cancellationToken: cancellationToken
+                );
+
+            //
+            return result;
+        }
+
+        /// <summary>
+        /// Add Reference a Model to Specific XRefence<TKey/> ...
+        /// </summary>
+        /// <param name="model"></param>
+        /// <param name="reference"></param>
+        /// <param name="connectionId"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public async Task<bool> AddReference(
+            XCategoryDto model,
+            XReference<int> reference,
+            string connectionId = null,
+            CancellationToken cancellationToken = default
+        )
+        {
+            //
+            var result = await categorySubCategoryReferenceProvider
+                .AddReference(
+                    model: model,
+                    reference: reference,
+                    connectionId: connectionId,
+                    cancellationToken: cancellationToken
+                );
+
+            //
+            return result;
+        }
+
+        /// <summary>
+        /// Remove Reference a Model for Specific Provided ID ...
+        /// </summary>
+        /// <param name="model"></param>
+        /// <param name="providedForId"></param>
+        /// <param name="connectionId"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public async Task<bool> RemoveReference(
+            XCategoryDto model,
+            int providedForId,
+            string connectionId = null,
+            CancellationToken cancellationToken = default
+        )
+        {
+            //
+            var result = await categorySubCategoryReferenceProvider
+                .RemoveReference(
+                    model: model,
+                    connectionId: connectionId,
+                    providedForId: providedForId,
+                    cancellationToken: cancellationToken
+                );
+
+            //
+            return result;
+        }
+
+        /// <summary>
+        /// Remove Reference a Model for Specific XRefence<TKey/> ...
+        /// </summary>
+        /// <param name="model"></param>
+        /// <param name="reference"></param>
+        /// <param name="connectionId"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public async Task<bool> RemoveReference(
+            XCategoryDto model,
+            XReference<int> reference,
+            string connectionId = null,
+            CancellationToken cancellationToken = default
+        )
+        {
+            //
+            var result = await categorySubCategoryReferenceProvider
+                .RemoveReference(
+                    model: model,
+                    reference: reference,
+                    connectionId: connectionId,
+                    cancellationToken: cancellationToken
+                );
+
+            //
+            return result;
+        }
+
+        /// <summary>
+        /// Remove All References to Specified Key ...
+        /// </summary>
+        /// <param name="providedForId"></param>
+        /// <param name="connectionId"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public async Task<bool> RemoveReferences(
+            int providedForId,
+            string connectionId = null,
+            CancellationToken cancellationToken = default
+        )
+        {
+            //
+            var result = await categorySubCategoryReferenceProvider
+                .RemoveReferences(
+                    connectionId: connectionId,
+                    providedForId: providedForId,
+                    cancellationToken: cancellationToken
+                );
+
+            //
+            return result;
+        }
+        #endregion
     }
 }
\ No newline at end of file