Better docs linking

Author: tomchristie

docs/topics/3.1-announcement.md

@@ -52,7 +52,7 @@ For more information, see the [custom pagination styles](../api-guide/pagination
 
 ## Versioning
 
-We've made it easier to build versioned APIs. Built-in schemes for versioning include both URL based and Accept header based variations.
+We've made it [easier to build versioned APIs][versioning]. Built-in schemes for versioning include both URL based and Accept header based variations.
 
 When using a URL based scheme, hyperlinked serializers will resolve relationships to the same API version as used on the incoming request.
 
@@ -80,7 +80,7 @@ The output representation would match the version used on the incoming request.
 
 ## Internationalization
 
-REST framework now includes a built-in set of translations, and supports internationalized error responses. This allows you to either change the default language, or to allow clients to specify the language via the `Accept-Language` header.
+REST framework now includes a built-in set of translations, and [supports internationalized error responses][internationalization]. This allows you to either change the default language, or to allow clients to specify the language via the `Accept-Language` header.
 
 You can change the default language by using the standard Django `LANGUAGE_CODE` setting:
 
@@ -204,3 +204,5 @@ This will either be made as a single 3.2 release, or split across two separate r
 
 [custom-exception-handler]: ../api-guide/exceptions.md#custom-exception-handling
 [pagination]: ../api-guide/pagination.md
+[versioning]: ../api-guide/versioning.md
+[internationalization]: internationalization.md