Cita APA (7th ed.)

Copi, I. M., & Cohen, C. (2019). Introduction to Logic (15th.). Routledge.

Cita Chicago (17th ed.)

Copi, Irving M., i Carl Cohen. Introduction to Logic. 15th. New York: Routledge, 2019.

Cita MLA (9th ed.)

Copi, Irving M., i Carl Cohen. Introduction to Logic. 15th. Routledge, 2019.