APA (7th ed.) Citation

Simpson, J. A., & Weiner, E. S. C. (1989). The Oxford English dictionary (2nd ed.). Clarendon Press.

Chicago Style (17th ed.) Citation

Simpson, J. A., and E. S. C. Weiner. The Oxford English Dictionary. 2nd ed. Oxford, UK: Clarendon Press, 1989.

MLA (9th ed.) Citation

Simpson, J. A., and E. S. C. Weiner. The Oxford English Dictionary. 2nd ed. Clarendon Press, 1989.