APA (7th ed.) Citation

Cohen, J. M., & Cohen, M. J. (1995). The Penguin dictionary of twentieth-century quotations (Rev. and expanded ed.). Penguin Books.

Chicago Style (17th ed.) Citation

Cohen, J. M., and M. J. Cohen. The Penguin Dictionary of Twentieth-century Quotations. Rev. and expanded ed. London ; New York: Penguin Books, 1995.

MLA (9th ed.) Citation

Cohen, J. M., and M. J. Cohen. The Penguin Dictionary of Twentieth-century Quotations. Rev. and expanded ed. Penguin Books, 1995.