Cita APA (7a ed.)

Johnson, D. W., & Johnson, R. T. (1999). Learning together and alone: Cooperative, competitive, and individualistic learning (5th 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. 5th ed. Boston [etc.]: Allyn and Bacon, 1999.

Cita MLA (9a ed.)

Johnson, David W., y Roger T. Johnson. Learning Together and Alone: Cooperative, Competitive, and Individualistic Learning. 5th ed. Allyn and Bacon, 1999.