Παραπομπή APA

Walton, D. N. (1989). Informal logic: A handbook for critical argumentation. Cambridge University Press.

Παραπομπή Chicago Style

Walton, Douglas N. Informal Logic: A Handbook for Critical Argumentation. Cambridge: Cambridge University Press, 1989.

Παραπομπή MLA

Walton, Douglas N. Informal Logic: A Handbook for Critical Argumentation. Cambridge University Press, 1989.