Παραπομπή APA

Barber, W. J. (1967). A Histoty of economic thought.

Παραπομπή Chicago Style

Barber, William J. A Histoty of Economic Thought. USA, Penguin Books, 1967.

Παραπομπή MLA

Barber, William J. A Histoty of Economic Thought. 1967.