Can you link a document within a document?
Link or Embed a file
To insert a copy of your file into another, embed or link to it. Go to Insert > Object. Select Create from File. Select Browse and choose the file you want to use.
Can you cross reference between two Word documents?
If you want to cross-reference items that reside in a separate document but don't want to use hyperlinks, you'll have to first combine the documents into one master document and then insert the cross-references. A master document is a container for a set of separate files (or subdocuments).