Παραπομπή APA
Walker, F. A. (1969). Science of wealth: A manual of political economy (7th ed. revised.). New York: Kraus Reprint Co.
Παραπομπή Chicago StyleWalker, Francis Amasa. Science of Wealth: A Manual of Political Economy. 7th ed. revised. New York: Kraus Reprint Co, 1969.
Παραπομπή MLAWalker, Francis Amasa. Science of Wealth: A Manual of Political Economy. 7th ed. revised. New York: Kraus Reprint Co, 1969.
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