Citazione Stile APA (7a Edizione)

Copi, I. M., & Cohen, C. (1990). Introduction to logic (8th ed.). Macmillan Publishing Company.

Citazione stile Chigago Style (17a edizione)

Copi, Irving M., e Carl Cohen. Introduction to Logic. 8th ed. New York: Macmillan Publishing Company, 1990.

Citatione MLA (9a ed.)

Copi, Irving M., e Carl Cohen. Introduction to Logic. 8th ed. Macmillan Publishing Company, 1990.