APA (7th ed.) Citation

Copi, I. M., & Cohen, C. (1986). Introduction to logic (8.ed., 2.print.). Macmillan.

Chicago Style (17th ed.) Citation

Copi, Irving M., and Carl Cohen. Introduction to Logic. 8.ed., 2.print. New York [u.a.]: Macmillan, 1986.

MLA (9th ed.) Citation

Copi, Irving M., and Carl Cohen. Introduction to Logic. 8.ed., 2.print. Macmillan, 1986.