Cita APA (7th ed.)

Copi, I. M., & Cohen, C. (1998). Introduction to logic (10th ed.). Prentice Hall.

Cita Chicago (17th ed.)

Copi, Irving M., i Carl Cohen. Introduction to Logic. 10th ed. Singapore: Prentice Hall, 1998.

Cita MLA (9th ed.)

Copi, Irving M., i Carl Cohen. Introduction to Logic. 10th ed. Prentice Hall, 1998.