APA aipamena

Copi, I. M., & Cohen, C. (2002). Introduction to logic (11th ed.). Prentice Hall.

Chicago Style aipamena

Copi, Irving M., and Carl Cohen. Introduction to Logic. 11th ed. Upper Saddle River, N.J: Prentice Hall, 2002.

MLA aipamena

Copi, Irving M., and Carl Cohen. Introduction to Logic. 11th ed. Prentice Hall, 2002.