APA引文

Copi, I. M. c. (2020). Introduction to Logic (15th.). Routledge.

芝加哥风格引文

Copi, Irring M; cohen. Introduction to Logic. 15th. New York: Routledge, 2020.

MLA引文

Copi, Irring M; cohen. Introduction to Logic. 15th. Routledge, 2020.