Citace podle APA (7th ed.)

Preston, R. C. (1968). Teaching social studies in the elementary school (3d ed.). Rinehart and Winston.

Citace podle Chicago (17th ed.)

Preston, Ralph Clausius. Teaching Social Studies in the Elementary School. 3d ed. New York: Rinehart and Winston, 1968.

Citace podle MLA (9th ed.)

Preston, Ralph Clausius. Teaching Social Studies in the Elementary School. 3d ed. Rinehart and Winston, 1968.

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