APA (7th ed.) Citation

Gottschalk, L. R. (1969). Understanding history: A primer of historical method (2d ed.). Knopf.

Chicago Style (17th ed.) Citation

Gottschalk, Louis Reichenthal. Understanding History: A Primer of Historical Method. 2d ed. New York: Knopf, 1969.

MLA (9th ed.) Citation

Gottschalk, Louis Reichenthal. Understanding History: A Primer of Historical Method. 2d ed. Knopf, 1969.