Cita APA

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

Citación estilo Chicago

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

Cita MLA

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