APA (7th ed.) Citation

Van Cleef, E. (1937). Trade centers and trade routes. D. Appleton-Century company, incorporated.

Chicago Style (17th ed.) Citation

Van Cleef, Eugene. Trade Centers and Trade Routes. New York, London: D. Appleton-Century company, incorporated, 1937.

MLA (9th ed.) Citation

Van Cleef, Eugene. Trade Centers and Trade Routes. D. Appleton-Century company, incorporated, 1937.