Copi,Irving M Cohen, & Carl & Rodych,Victor. (2020). Introduction to logic (15.). Routledge.
Chicago-čujuhus (17. p.)Copi,Irving M Cohen, juo Carl & Rodych,Victor. Introduction to Logic. 15. New York: Routledge, 2020.
MLA-čujuhus (9. p.)Copi,Irving M Cohen, juo Carl & Rodych,Victor. Introduction to Logic. 15. Routledge, 2020.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.