Copi, I. M. c. (2020). Introduction to Logic (15th.). Routledge.
Chicagoスタイル(17版)引用形式Copi, Irring M; cohen. Introduction to Logic. 15th. New York: Routledge, 2020.
MLA(9版)引用形式Copi, Irring M; cohen. Introduction to Logic. 15th. Routledge, 2020.
警告: この引用は必ずしも正確ではありません.