APA-viite (7. p.)
Barber, W. J. (2009). A history of economic thought (1st Wesleyan ed.). Wesleyan University Press.
Chicago-viite (17. p.)
Barber, William J. A History of Economic Thought. 1st Wesleyan ed. Middletown, Conn.: Wesleyan University Press, 2009.
MLA-viite (9. p.)
Barber, William J. A History of Economic Thought. 1st Wesleyan ed. Wesleyan University Press, 2009.
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