Johnson, E. A., & Michael, R. E. (1958). Principles of teaching. Allyn and Bacon.
Chicago Style aipamenaJohnson, Earl A., and Ruby Eldon Michael. Principles of Teaching. Boston: Allyn and Bacon, 1958.
MLA aipamenaJohnson, Earl A., and Ruby Eldon Michael. Principles of Teaching. Allyn and Bacon, 1958.
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