Hurley, P. J., & Watson, L. (2018). Concise introduction to logic (13th ed.). Cengage.
Lua i Stíl Chicago (17ú heag.)Hurley, Patrick J., agus Lori Watson. Concise Introduction to Logic. 13th ed. India: Cengage, 2018.
Lua MLA (9ú heag.)Hurley, Patrick J., agus Lori Watson. Concise Introduction to Logic. 13th ed. Cengage, 2018.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.