all the other reference that were in the book (which were amusingly marked with asterisks)
A common strategy in several of the Bantam ST novels, and even a lot of the early fanzines of the day. There are a few in TMP's novelization and (probably) Marshak & Culbreath's Pocket novels.
These days authors footnote whole novels
on their websites!
"Spock must Die!" was probably about my sixth original ST novel I read in 1980. The day I found it, I was very excited - I felt like I already knew Blish quite well, via his chatty introductions to the episode adaptations he had done - and it was a great read. By this time, I'd only seen about half of TOS, but I knew I was onto something wonderful.