APA (7 ম সংস্করণ) উদ্ধৃতি
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.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি
Johnson, David W., Roger T. Johnson, এবং Edythe Johnson Holubec. The New Circles of Learning: Cooperation in the Classroom and School. Alexandria, Va.: Association for Supervision and Curriculum Development, 1994.
M.L.A (9 ম সংস্করণ) উদ্ধৃতি
Johnson, David W., et al. The New Circles of Learning: Cooperation in the Classroom and School. Association for Supervision and Curriculum Development, 1994.
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