APA (7th ed.) Zitazioa
Soule, G. (1948). The new science of economics: An introduction. A Fawcett Premier Book.
Chicago Style (17th ed.) Zitazioa
Soule, George. The New Science of Economics: An Introduction. New York: A Fawcett Premier Book, 1948.
MLA (9th ed.) Zitazioa
Soule, George. The New Science of Economics: An Introduction. A Fawcett Premier Book, 1948.
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