Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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