Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (8a ed.)

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