Bedau, H. A. (1999). Critical thinking, reading, and writing: A brief guide to argument (3rd ed.). Bedford/St. Martin's.
Dyfyniad Arddull ChicagoBedau, Hugo Adam. Critical Thinking, Reading, and Writing: A Brief Guide to Argument. 3rd ed. Boston: Bedford/St. Martin's, 1999.
Dyfyniad MLABedau, Hugo Adam. Critical Thinking, Reading, and Writing: A Brief Guide to Argument. 3rd ed. Bedford/St. Martin's, 1999.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.