APA (7th ed.) Citation

Crystal, D. (2004). The Penguin encyclopedia (Rev. 2nd ed.). Penguin Books.

Chicago Style (17th ed.) Citation

Crystal, David. The Penguin Encyclopedia. Rev. 2nd ed. London, New York: Penguin Books, 2004.

MLA (9th ed.) Citation

Crystal, David. The Penguin Encyclopedia. Rev. 2nd ed. Penguin Books, 2004.