APA استشهاد

Copi, I. M. (1997). Symbolic logic (5th ed.). Prentice Hall of India.

استشهاد بنمط شيكاغو

Copi, Irving M. Symbolic Logic. 5th ed. New Delhi: Prentice Hall of India, 1997.

MLA استشهاد

Copi, Irving M. Symbolic Logic. 5th ed. Prentice Hall of India, 1997.