Gemmill, P. F. (1942). Economics: Principles and problems. New York: Harper & Brothers Publishers.
シカゴスタイル引用形Gemmill, Paul F. Economics: Principles and Problems. New York: Harper & Brothers Publishers, 1942.
MLA引用形式Gemmill, Paul F. Economics: Principles and Problems. New York: Harper & Brothers Publishers, 1942.
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