Cita APA (7th ed.)

Copi & Irving M. (1995). Symbolic Logic (5th ed.). Prentice-Hall of India.

Cita Chicago (17th ed.)

Copi i Irving M. Symbolic Logic. 5th ed. New Delhi: Prentice-Hall of India, 1995.

Cita MLA (9th ed.)

Copi i Irving M. Symbolic Logic. 5th ed. Prentice-Hall of India, 1995.