I'm going to get a bit complainy about the construction of this text. Some of this may be duplicated in my eventual review. Because this could be so much better written & organized.

For example:

In chapter 3, the book describes three settings for citations:: reference notes, source labels, and reference lists. Then the text states "reference notes & source labels have similar purposes" and "reference lists have a distinctly different purpose".

What purposes? The reader has to go read later sections to find those out. That's the sort of thing that should be in this intro/summary for a textbook.