APA-referens (7:e uppl.)

Barber, W. J. (2009). A history of economic thought (1st Wesleyan ed.). Wesleyan University Press.

Chicago-referens (17:e uppl.)

Barber, William J. A History of Economic Thought. 1st Wesleyan ed. Middletown, Conn.: Wesleyan University Press, 2009.

MLA-referens (9:e uppl.)

Barber, William J. A History of Economic Thought. 1st Wesleyan ed. Wesleyan University Press, 2009.