Cita APA (7th ed.)

Schmidt, S. W., & Shelley, M. C. (1991). American government and politics today. West.

Cita Chicago (17th ed.)

Schmidt, Steffen W., i Mack C. Shelley. American Government and Politics Today. Saint Paul: West, 1991.

Cita MLA (9th ed.)

Schmidt, Steffen W., i Mack C. Shelley. American Government and Politics Today. West, 1991.