Cita APA (7th ed.)

Humphrey, D. D. (1964). The United States and the common market: A background study (2a. ed.). Frederick A. Praeger.

Cita Chicago (17th ed.)

Humphrey, Don D. The United States and the Common Market: A Background Study. 2a. ed. Nueva York: Frederick A. Praeger, 1964.

Cita MLA (9th ed.)

Humphrey, Don D. The United States and the Common Market: A Background Study. 2a. ed. Frederick A. Praeger, 1964.