Johnson, D. W., Johnson, R. T., & Holubec, E. J. (1994). The new circles of learning : cooperation in the classroom and school / David W. Johnson, Roger T. Johnson, Edythe Johnson Holubec: Cooperation in the classroom and school. Association for Supervision and Curriculum Development.
Chicago Style (17th ed.) CitationJohnson, David W., Roger T. Johnson, and Edythe Johnson Holubec. The New Circles of Learning : Cooperation in the Classroom and School / David W. Johnson, Roger T. Johnson, Edythe Johnson Holubec: Cooperation in the Classroom and School. Alexandria, Va.: Association for Supervision and Curriculum Development, 1994.
MLA (9th ed.) CitationJohnson, David W., et al. The New Circles of Learning : Cooperation in the Classroom and School / David W. Johnson, Roger T. Johnson, Edythe Johnson Holubec: Cooperation in the Classroom and School. Association for Supervision and Curriculum Development, 1994.