APA (7th ed.) Citation

Swarthout, J. M., & Bartley, E. R. (1951). Principles and problems of American national government. Oxford University Press.

Chicago Style (17th ed.) Citation

Swarthout, John M., and Ernest R. Bartley. Principles and Problems of American National Government. New York: Oxford University Press, 1951.

MLA (9th ed.) Citation

Swarthout, John M., and Ernest R. Bartley. Principles and Problems of American National Government. Oxford University Press, 1951.