Cryer, D., Harms, T., & Ray, A. R. (1996). Active learning for fours. Innovative Learning Publications, Addison-Wesley Publishing Co..
Čikaški stil citiranja (17. izdanje)Cryer, Debby, Thelma Harms, i Adele Richardson Ray. Active Learning for Fours. Menlo Park, Calif.: Innovative Learning Publications, Addison-Wesley Publishing Co., 1996.
MLA način citiranja (8. izdanje)Cryer, Debby, et al. Active Learning for Fours. Innovative Learning Publications, Addison-Wesley Publishing Co., 1996.
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