One approach to operationalize this problem is to breakdown the contents of the CTT+ accreditation. References could include the CTT+ study guides.
Another approach is to review the content of a trade group such as the ASTD. Certain works seem to get good reviews, notably "Telling ain't training", "Beyond telling ain't training fieldbook", etc. Some other decent works seem to be the "ASTD handbook of measuring and evaluating training" and "The ASTD handbook of training design and delivery".
These things might be worth putting on my ILL list.