Guide to Muscle Cars, April 1989 Volume 7 Number 2
p.26-31 Birthday Bird, Trans Am Celebrates It's 20th!
Although a rather extensive article, it mostly covers the history behind the TA from the beginning. Only a short paragraph on the TTA and also no pictures. Does include, however, many photos of previous models and production figures from 1969-1986. Also a test report of '89 GTA in same issue p.22-23.