Cita APA (7th ed.)

Copi, I. M., & Cohen, C. (2005). Introduction to logic (12th ed.). Pearson/Prentice Hall.

Cita Chicago (17th ed.)

Copi, Irving M., i Carl Cohen. Introduction to Logic. 12th ed. Upper Saddle River, N.J: Pearson/Prentice Hall, 2005.

Cita MLA (9th ed.)

Copi, Irving M., i Carl Cohen. Introduction to Logic. 12th ed. Pearson/Prentice Hall, 2005.