Cita APA (7th ed.)

Coyle, D. C. (1954). The United States political system and how it works. New American Library.

Cita Chicago (17th ed.)

Coyle, David Cushman. The United States Political System and How It Works. Nueva York: New American Library, 1954.

Cita MLA (9th ed.)

Coyle, David Cushman. The United States Political System and How It Works. New American Library, 1954.