Johnson, D. W. (1999). Learning together and alone: Cooperative, competitive, and individualistic learning (5th ed.). Boston: Allyn and Bacon.
استشهاد بنمط شيكاغوJohnson, David W. Learning Together and Alone: Cooperative, Competitive, and Individualistic Learning. 5th ed. Boston: Allyn and Bacon, 1999.
MLA استشهادJohnson, David W. Learning Together and Alone: Cooperative, Competitive, and Individualistic Learning. 5th ed. Boston: Allyn and Bacon, 1999.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.