APA (7th ed.) Zitazioa

Copi, I. M. (1986). Introduction to logic: Introduction to logic (7th ed.). Macmillan.

Chicago Style (17th ed.) Zitazioa

Copi, Irving M. Introduction to Logic: Introduction to Logic. 7th ed. New York: Macmillan, 1986.

MLA (9th ed.) Zitazioa

Copi, Irving M. Introduction to Logic: Introduction to Logic. 7th ed. Macmillan, 1986.