Hurley, P. J. (1985). A concise introduction to logic (2 ed.). Wadsworth.
Chicago-čujuhus (17. p.)Hurley, Patrick J. A Concise Introduction to Logic. 2 ed. Belmont: Wadsworth, 1985.
MLA-čujuhus (9. p.)Hurley, Patrick J. A Concise Introduction to Logic. 2 ed. Wadsworth, 1985.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.