Johnson, D. W. (1994). The new circles of learning: Cooperation in the classroom and school. Association for Supervision and Curriculum Development.
Chicago-Zitierstil (17. Ausg.)Johnson, David W. The New Circles of Learning: Cooperation in the Classroom and School. Alexandria, Va: Association for Supervision and Curriculum Development, 1994.
MLA-Zitierstil (9. Ausg.)Johnson, David W. The New Circles of Learning: Cooperation in the Classroom and School. Association for Supervision and Curriculum Development, 1994.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.