Cita APA (7th ed.)

Guttenplan, S. (1997). The Languages of Logic: An introduction to formal logic (2nd ed.). Blackwell.

Cita Chicago (17th ed.)

Guttenplan, Samuel. The Languages of Logic: An Introduction to Formal Logic. 2nd ed. Oxford: Blackwell, 1997.

Cita MLA (9th ed.)

Guttenplan, Samuel. The Languages of Logic: An Introduction to Formal Logic. 2nd ed. Blackwell, 1997.