Lua APA (7ú heag.)
Hoyningen-Huene, P., & Levine, A. (2004). Formal logic: A philosophical approach. University of Pittsburgh Press.
Lua i Stíl Chicago (17ú heag.)
Hoyningen-Huene, Paul, agus Alex Levine. Formal Logic: A Philosophical Approach. Pittsburgh, Pennsylvania: University of Pittsburgh Press, 2004.
Lua MLA (9ú heag.)
Hoyningen-Huene, Paul, agus Alex Levine. Formal Logic: A Philosophical Approach. University of Pittsburgh Press, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.