Chain references provide a great way to perform a topical study. Most Bibles that have references do not have chain references. Instead, they have cross references. Cross references are great, but it can get very confusing when you have to flip back and forth over the same verses over and over. Some Bibles do not have the verses linked to the reference, so there’s no easy way to know which reference will go with which portion of the verse. If your Bible has any room for writing at all, you can greatly expand the study quality of your Bible by adding your own chain reference system.