APA (7th ed.) Citation

Cohen, J. M., & Cohen, M. J. (1983). The Penguin dictionary of quotations. Penguin Books.

Chicago Style (17th ed.) Citation

Cohen, John Michael, and Mark J. Cohen. The Penguin Dictionary of Quotations. Middlesex, England: Penguin Books, 1983.

MLA (9th ed.) Citation

Cohen, John Michael, and Mark J. Cohen. The Penguin Dictionary of Quotations. Penguin Books, 1983.