APA (7th ed.) Citation

Copi. (1986). Informal logic. Macmillan Collier Macmillan.

Chicago Style (17th ed.) Citation

Copi. Informal Logic. New York London: Macmillan Collier Macmillan, 1986.

MLA (8th ed.) Citation

Copi. Informal Logic. Macmillan Collier Macmillan, 1986.