WebLibNetCopi, I. M., & Cohen, C. (1990). Introduction to logic (8th ed.). New York: Macmillan.
Chicago Style CitationCopi, Irving M., and Carl Cohen. Introduction to Logic. 8th ed. New York: Macmillan, 1990.
MLA CitationCopi, Irving M., and Carl Cohen. Introduction to Logic. 8th ed. New York: Macmillan, 1990.
Warning: These citations may not always be 100% accurate.