Cita APA (7th ed.)

Copi, I. M. (1979). Symbolic logic (5th ed.). Prentice-Hall.

Cita Chicago (17th ed.)

Copi, Irving M. Symbolic Logic. 5th ed. New Delhi: Prentice-Hall, 1979.

Cita MLA (9th ed.)

Copi, Irving M. Symbolic Logic. 5th ed. Prentice-Hall, 1979.