APA (7th ed.) Citation

Van Valkenburg, S., & Erickson, F. C. (1939). Elements of political geography. Prentice-Hall.

Chicago Style (17th ed.) Citation

Van Valkenburg, Samuel, and Franklin C. Erickson. Elements of Political Geography. New York: Prentice-Hall, 1939.

MLA (9th ed.) Citation

Van Valkenburg, Samuel, and Franklin C. Erickson. Elements of Political Geography. Prentice-Hall, 1939.