APA (7th ed.) Zitazioa

Barber, W. J. (1967). A History of economic thought. Penguin books.

Chicago Style (17th ed.) Zitazioa

Barber, William J. A History of Economic Thought. England: Penguin books, 1967.

MLA (9th ed.) Zitazioa

Barber, William J. A History of Economic Thought. Penguin books, 1967.