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.