Cita APA (7a ed.)

Levi, D. S. (2000). In defense of informal logic. Kluwer Academic.

Cita Chicago Style (17a ed.)

Levi, Don S. In Defense of Informal Logic. Dordrecht: Kluwer Academic, 2000.

Cita MLA (9a ed.)

Levi, Don S. In Defense of Informal Logic. Kluwer Academic, 2000.