Johnson, D. W. (1999). Learning together and alone: Cooperative, competitive, and individualistic learning (5th ed.). Boston: Allyn and Bacon.
Trích dẫn kiểu ChicagoJohnson, David W. Learning Together and Alone: Cooperative, Competitive, and Individualistic Learning. 5th ed. Boston: Allyn and Bacon, 1999.
Deismireacht MLAJohnson, David W. Learning Together and Alone: Cooperative, Competitive, and Individualistic Learning. 5th ed. Boston: Allyn and Bacon, 1999.
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