APA (7th ed.) Citation

Flesch, R. (1957). The book of unusual quotations. Harper.

Chicago Style (17th ed.) Citation

Flesch, Rudolf. The Book of Unusual Quotations. New York: Harper, 1957.

MLA (9th ed.) Citation

Flesch, Rudolf. The Book of Unusual Quotations. Harper, 1957.

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