APA

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

Chicago

Johnson Earl Shepard, . 1956. Theory and practice of the social studies. New York: Macmillan.

Harvard

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

MLA

Johnson Earl Shepard, . Theory and practice of the social studies. New York: Macmillan. 1956.