Tohutoro APA (7th ed.)
Leypoldt, M. M. (1967). 40 ways to teach in groups. Judson Press.
Tohutoru Kātū Chicago (17th ed.)
Leypoldt, Martha M. 40 Ways to Teach in Groups. Valley Forge: Judson Press, 1967.
Tohutoro MLA (9th ed.)
Leypoldt, Martha M. 40 Ways to Teach in Groups. Judson Press, 1967.
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