Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

Copi, Irving M., i Carl Cohen. Introduction to Logic. 11th ed. New York: Macmillan Pub, 2002.

Cita MLA (9th ed.)

Copi, Irving M., i Carl Cohen. Introduction to Logic. 11th ed. Macmillan Pub, 2002.