APA (7th ed.) Citation

Ross, E. A. (1930). Principles of sociology (1st revision.). The Century co..

Chicago Style (17th ed.) Citation

Ross, Edward Alsworth. Principles of Sociology. 1st revision. New York, London: The Century co., 1930.

MLA (9th ed.) Citation

Ross, Edward Alsworth. Principles of Sociology. 1st revision. The Century co., 1930.