APA (7th ed.) Zitazioa

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

Chicago Style (17th ed.) Zitazioa

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

MLA (9th ed.) Zitazioa

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