Cita APA (7th ed.)

Copi, I. M. (1979). Symbolic Logic (5th ed.). Macmillan.

Cita Chicago (17th ed.)

Copi, Irving M. Symbolic Logic. 5th ed. New York: Macmillan, 1979.

Cita MLA (9th ed.)

Copi, Irving M. Symbolic Logic. 5th ed. Macmillan, 1979.