Cita APA (7a ed.)

Johnson, D. W., Johnson, R. T., & Holubec, E. J. (1994). The New Circles of Learning: Cooperation in the Classroom and School. ASCD.

Cita Chicago Style (17a ed.)

Johnson, David W., Roger T. Johnson, y Edythe Johnson Holubec. The New Circles of Learning: Cooperation in the Classroom and School. Alexandria: ASCD, 1994.

Cita MLA (8a ed.)

Johnson, David W., et al. The New Circles of Learning: Cooperation in the Classroom and School. ASCD, 1994.