Παραπομπή APA

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

Παραπομπή Chicago Style

Barber, William J. History of Economic Thought. Australia: Penguin Books, 1967.

Παραπομπή MLA

Barber, William J. History of Economic Thought. Penguin Books, 1967.