Cita APA (7a ed.)

Copi, I. M. (1961). Symbolic logic (6th printing.). MacMillan Company.

Cita Chicago Style (17a ed.)

Copi, Irving M. Symbolic Logic. 6th printing. New York: MacMillan Company, 1961.

Cita MLA (9a ed.)

Copi, Irving M. Symbolic Logic. 6th printing. MacMillan Company, 1961.