Cita APA (7th ed.)

Johnson, E. A., & Michael, R. E. (1958). Principles of teaching. Allyn and Bacon.

Cita Chicago (17th ed.)

Johnson, Earl A., i Ruby Eldon Michael. Principles of Teaching. Boston: Allyn and Bacon, 1958.

Cita MLA (8th ed.)

Johnson, Earl A., i Ruby Eldon Michael. Principles of Teaching. Allyn and Bacon, 1958.