APA (7th ed.) Citation

Flesch, R. F. (1960). How to write, speak, and think more effectively. Harper.

Chicago Style (17th ed.) Citation

Flesch, Rudolf Franz. How to Write, Speak, and Think More Effectively. New York: Harper, 1960.

MLA (9th ed.) Citation

Flesch, Rudolf Franz. How to Write, Speak, and Think More Effectively. Harper, 1960.