APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (9:e uppl.)

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