Johnson, D. W., & Johnson, R. T. (1991). Learning together and alone: Cooperative, competitive, and individualistic learning (Third edition.). Allyn and Bacon ; Prentice-hall, Inc..
Citace podle Chicago (17th ed.)Johnson, David W., a Roger T. Johnson. Learning Together and Alone: Cooperative, Competitive, and Individualistic Learning. Third edition. Boston: Allyn and Bacon ; Prentice-hall, Inc., 1991.
Citace podle MLA (8th ed.)Johnson, David W., a Roger T. Johnson. Learning Together and Alone: Cooperative, Competitive, and Individualistic Learning. Third edition. Allyn and Bacon ; Prentice-hall, Inc., 1991.
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