Johnson, D. W., & Johnson, R. T. (1994). Learning together and alone: Cooperative, competitive, and individualistic learning (4th ed.). Allyn and Bacon.
Cita Chicago Style (17a ed.)Johnson, David W., y Roger T. Johnson. Learning Together and Alone: Cooperative, Competitive, and Individualistic Learning. 4th ed. Boston [etc.]: Allyn and Bacon, 1994.
Cita MLA (9a ed.)Johnson, David W., y Roger T. Johnson. Learning Together and Alone: Cooperative, Competitive, and Individualistic Learning. 4th ed. Allyn and Bacon, 1994.
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