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

Copi, Irving M., Carl Cohen, and Victor Rodych. Introduction To Logic. 15th. New York: Routledge, 2019.

Copi, Irving M., et al. Introduction To Logic. 15th. Routledge, 2019.