Large Word documents are often sprinkled with references to information throughout a document. You can enter them manually, but they'll be hard to maintain later. Instead, use this simple technique.

Fields that don't update automatically pose a problem with many users because they don't remember to update them manually. When you need this functionality, use this VBA procedure.

If you see Error Bookmark Not defined or Error Reference source not found in Word, then use the solutions mentioned in this post to fix the issue.