Cita APA (7th ed.)

Copi, I. M., & Cohen, C. (2009). Introduction to Logic: Introduction to Logic (13th ed.). Pearson Education.

Cita Chicago (17th ed.)

Copi, Irving M., i Carl Cohen. Introduction to Logic: Introduction to Logic. 13th ed. New Delhi: Pearson Education, 2009.

Cita MLA (9th ed.)

Copi, Irving M., i Carl Cohen. Introduction to Logic: Introduction to Logic. 13th ed. Pearson Education, 2009.