Barber, W. J. (1967). A history of economic thought. New York: Penguin Books.
Trích dẫn kiểu ChicagoBarber, William J. A History of Economic Thought. New York: Penguin Books, 1967.
MLA引文Barber, William J. A History of Economic Thought. New York: Penguin Books, 1967.
警告：这些引文格式不一定是100％准确.