Cita APA (7a ed.)

Copi, I. M., & Cohen, C. (2002). Introduction to logic (Eleventh edition.). Prentice Hall.

Cita Chicago Style (17a ed.)

Copi, Irving M., y Carl Cohen. Introduction to Logic. Eleventh edition. Upper Saddle River, New Jersey: Prentice Hall, 2002.

Cita MLA (9a ed.)

Copi, Irving M., y Carl Cohen. Introduction to Logic. Eleventh edition. Prentice Hall, 2002.