Copi, I. M., & Rodych, V. C. (2019). Introduction to logic (15th ed.). Routledge.
Chicago-čujuhus (17. p.)Copi, Irving M., juo Victor Cohen Rodych. Introduction to Logic. 15th ed. New York: Routledge, 2019.
MLA-čujuhus (9. p.)Copi, Irving M., juo Victor Cohen Rodych. Introduction to Logic. 15th ed. Routledge, 2019.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.