APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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