Cita APA (7th ed.)
Hurley, P. J. (1997). A concise introduction to logic (6th.). Wadsworth.
Cita Chicago (17th ed.)
Hurley, Patrick J. A Concise Introduction to Logic. 6th. Belmont: Wadsworth, 1997.
Cita MLA (9th ed.)
Hurley, Patrick J. A Concise Introduction to Logic. 6th. Wadsworth, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.