APA (7e ed.) Bronvermelding

Cryer, D., Harms, T., & Ray, A. R. (1996). Active learning for fours. Innovative Learning Publications, Addison-Wesley Publishing Co..

Chicago (17e ed.) Bronvermelding

Cryer, Debby, Thelma Harms, en Adele Richardson Ray. Active Learning for Fours. Menlo Park, Calif.: Innovative Learning Publications, Addison-Wesley Publishing Co., 1996.

MLA (8e ed.) Bronvermelding

Cryer, Debby, et al. Active Learning for Fours. Innovative Learning Publications, Addison-Wesley Publishing Co., 1996.