APA (7th ed.) Citation

Johnson, D. W., Johnson, R. T., & Holubec, E. J. (1990). Circles of learning: Cooperation in the classroom (3. ed.). Interaction Book Co.

Chicago Style (17th ed.) Citation

Johnson, David W., Roger T. Johnson, and Edythe Johnson Holubec. Circles of Learning: Cooperation in the Classroom. 3. ed. Edina, Minn: Interaction Book Co, 1990.

MLA (9th ed.) Citation

Johnson, David W., et al. Circles of Learning: Cooperation in the Classroom. 3. ed. Interaction Book Co, 1990.