Cita APA (7a ed.)

Walton, D. N. (1998). Informal logic: A handbook for critical argumentation. University Press.

Cita Chicago Style (17a ed.)

Walton, Douglas N. Informal Logic: A Handbook for Critical Argumentation. Cambridge: University Press, 1998.

Cita MLA (9a ed.)

Walton, Douglas N. Informal Logic: A Handbook for Critical Argumentation. University Press, 1998.