Hurley, P. J. (1988). A concise introduction to logic (3ª ed.). Wadsworth.
Dyfyniad Arddull ChicagoHurley, Patrick J. A Concise Introduction to Logic. 3ª ed. Wadsworth, 1988.
Dyfyniad MLAHurley, Patrick J. A Concise Introduction to Logic. 3ª ed. Wadsworth, 1988.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.