APA-referens (7:e uppl.)

Cryer, D., Bourland, B., & Harms, T. (1988). Active learning for threes. Addison-Wesley Publishing Company.

Chicago-referens (17:e uppl.)

Cryer, Debby, Beth Bourland, och Thelma Harms. Active Learning for Threes. Menlo Park, California: Addison-Wesley Publishing Company, 1988.

MLA-referens (9:e uppl.)

Cryer, Debby, et al. Active Learning for Threes. Addison-Wesley Publishing Company, 1988.