Cita APA (7th ed.)

Churchill, R. P. (1990). Becoming logical : an introduction to logic: An introduction to logic. St. Martin's Press.

Cita Chicago (17th ed.)

Churchill, Robert Paul. Becoming Logical : An Introduction to Logic: An Introduction to Logic. New York: St. Martin's Press, 1990.

Cita MLA (9th ed.)

Churchill, Robert Paul. Becoming Logical : An Introduction to Logic: An Introduction to Logic. St. Martin's Press, 1990.