Cita APA (7a ed.)

Forbes, G. (1994). Modern logic: A text in elementary symbolic logic. Oxford University Press.

Cita Chicago Style (17a ed.)

Forbes, Graeme. Modern Logic: A Text in Elementary Symbolic Logic. New York [etc.]: Oxford University Press, 1994.

Cita MLA (9a ed.)

Forbes, Graeme. Modern Logic: A Text in Elementary Symbolic Logic. Oxford University Press, 1994.