Cita APA (7th ed.)
Johnson, D. W., Johnson, R. T., & Holubec, E. J. (1994). The new circles of learning: Cooperation in the classroom and school. Association for Supervision and Curriculum Development.
Cita Chicago (17th ed.)
Johnson, David W., Roger T. Johnson, i Edythe Johnson Holubec. The New Circles of Learning: Cooperation in the Classroom and School. Alexandria, Va.: Association for Supervision and Curriculum Development, 1994.
Cita MLA (9th ed.)
Johnson, David W., et al. The New Circles of Learning: Cooperation in the Classroom and School. Association for Supervision and Curriculum Development, 1994.
Atenció: Aquestes cites poden no estar 100% correctes.