Cohen, M., & Nagel, E. (1934). An introduction to logic and scientific method. New York: Harcourt, Brace and Company.
Παραπομπή Chicago StyleCohen, Morris, and Ernest Nagel. An Introduction to Logic and Scientific Method. New York: Harcourt, Brace and Company, 1934.
Παραπομπή MLACohen, Morris, and Ernest Nagel. An Introduction to Logic and Scientific Method. New York: Harcourt, Brace and Company, 1934.
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