APA (7th ed.) Zitazioa

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

Chicago Style (17th ed.) Zitazioa

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

MLA (9th ed.) Zitazioa

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