Tohutoro APA (7th ed.)
Copi, I. M. (1982). Introduction to logic (6th ed.). Macmillan.
Tohutoru Kātū Chicago (17th ed.)
Copi, Irving M. Introduction to Logic. 6th ed. New York: Macmillan, 1982.
Tohutoro MLA (9th ed.)
Copi, Irving M. Introduction to Logic. 6th ed. Macmillan, 1982.
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