Cita APA (7th ed.)

Johnson, E. S. (1956). Theory and practice of the social studies. Macmillan.

Cita Chicago (17th ed.)

Johnson, Earl Shepard. Theory and Practice of the Social Studies. New York: Macmillan, 1956.

Cita MLA (8th ed.)

Johnson, Earl Shepard. Theory and Practice of the Social Studies. Macmillan, 1956.