Soule, G. H. (1964). The new science of economics: An introduction. Viking Press.
Lua i Stíl Chicago (17ú heag.)Soule, George Henry. The New Science of Economics: An Introduction. New York: Viking Press, 1964.
Lua MLA (9ú heag.)Soule, George Henry. The New Science of Economics: An Introduction. Viking Press, 1964.
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