APA (7th ed.) Citation

Swarthout, J. M., & Bartley, E. R. (1955). Principles and problems of american national government (2a. ed.). Oxford University.

Chicago Style (17th ed.) Citation

Swarthout, John M., and Ernest R. Bartley. Principles and Problems of American National Government. 2a. ed. Nueva York: Oxford University, 1955.

MLA (9th ed.) Citation

Swarthout, John M., and Ernest R. Bartley. Principles and Problems of American National Government. 2a. ed. Oxford University, 1955.