APA-referens (7:e uppl.)

Shurter, R. L. (1966). Critical thinking. McGraw-Hill.

Chicago-referens (17:e uppl.)

Shurter, Robert L. Critical Thinking. New York: McGraw-Hill, 1966.

MLA-referens (9:e uppl.)

Shurter, Robert L. Critical Thinking. McGraw-Hill, 1966.