Hurley, P. J., & Watson, L. (2018). Concise introduction to logic (13th ed.). Cengage.
Chicago-čujuhus (17. p.)Hurley, Patrick J., juo Lori Watson. Concise Introduction to Logic. 13th ed. India: Cengage, 2018.
MLA-čujuhus (9. p.)Hurley, Patrick J., juo Lori Watson. Concise Introduction to Logic. 13th ed. Cengage, 2018.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.