APA-referens (7:e uppl.)

Flesch, R. F. (1951). The art of clear thinking. Harper.

Chicago-referens (17:e uppl.)

Flesch, Rudolf Franz. The Art of Clear Thinking. New York: Harper, 1951.

MLA-referens (9:e uppl.)

Flesch, Rudolf Franz. The Art of Clear Thinking. Harper, 1951.