Copi, I. M. (1964). Introduction to logic (2nd ed., 7th print.). MacMillan.
Cita Chicago Style (17a ed.)Copi, Irving M. Introduction to Logic. 2nd ed., 7th print. New York: MacMillan, 1964.
Cita MLA (9a ed.)Copi, Irving M. Introduction to Logic. 2nd ed., 7th print. MacMillan, 1964.
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