APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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

Warning: These citations may not always be 100% accurate.