Cita APA (7th ed.)

Copi.Irving M. (2004). Introduction to Logic (11.). Prentice-Hall of India.

Cita Chicago (17th ed.)

Copi.Irving M. Introduction to Logic. 11. New Delhi: Prentice-Hall of India, 2004.

Cita MLA (9th ed.)

Copi.Irving M. Introduction to Logic. 11. Prentice-Hall of India, 2004.