APA (7th ed.) Citation
McMahon, A. M. S., & McMahon, R. (2005). Language classification by numbers. Oxford University Press.
Chicago Style (17th ed.) Citation
McMahon, April M. S., and Robert McMahon. Language Classification by Numbers. Oxford ; New York: Oxford University Press, 2005.
MLA (9th ed.) Citation
McMahon, April M. S., and Robert McMahon. Language Classification by Numbers. Oxford University Press, 2005.
Warning: These citations may not always be 100% accurate.