Cita APA (7th ed.)
Hoyningen-Huene, P., & Levine, A. (2004). Formal logic: A philosophical approach. University of Pittsburgh Press.
Cita Chicago (17th ed.)
Hoyningen-Huene, Paul, i Alex Levine. Formal Logic: A Philosophical Approach. Pittsburgh, Pennsylvania: University of Pittsburgh Press, 2004.
Cita MLA (9th ed.)
Hoyningen-Huene, Paul, i Alex Levine. Formal Logic: A Philosophical Approach. University of Pittsburgh Press, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.