APA (7th ed.) Citation
Copi, I. M. (1986). Informal Logic (1. ed.). MacMillan Publ. Co.
Chicago Style (17th ed.) Citation
Copi, Irving M. Informal Logic. 1. ed. New York: MacMillan Publ. Co, 1986.
MLA (9th ed.) Citation
Copi, Irving M. Informal Logic. 1. ed. MacMillan Publ. Co, 1986.
Warning: These citations may not always be 100% accurate.