Copi, I. M., Cohen, C., & Rodych, V. (2019). Introduction To Logic (15th.). Routledge.
芝加哥风格引文Copi, Irving M., Carl Cohen, 与 Victor Rodych. Introduction To Logic. 15th. New York: Routledge, 2019.
MLA引文Copi, Irving M., et al. Introduction To Logic. 15th. Routledge, 2019.
警告：这些引文格式不一定是100％准确.