Copi, I. M., & Gould, J. A. (1972). Readings on logic (2nd ed.). Macmillan.
Chicago Style (17th ed.) CitationCopi, Irving M., and James A. Gould. Readings on Logic. 2nd ed. New York: Macmillan, 1972.
MLA (9th ed.) CitationCopi, Irving M., and James A. Gould. Readings on Logic. 2nd ed. Macmillan, 1972.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.