Cita APA (7th ed.)

COPI, I. M. (1969). Introduction to logic.-- 3rd ed. The Macmillan Company.

Cita Chicago (17th ed.)

COPI, Irving M. Introduction to Logic.-- 3rd Ed. London: The Macmillan Company, 1969.

Cita MLA (9th ed.)

COPI, Irving M. Introduction to Logic.-- 3rd Ed. The Macmillan Company, 1969.