APA (7th ed.) Citation

Hobson, A. (2001). The Oxford dictionary of difficult words. Oxford University Press.

Chicago Style (17th ed.) Citation

Hobson, Archie. The Oxford Dictionary of Difficult Words. New York: Oxford University Press, 2001.

MLA (9th ed.) Citation

Hobson, Archie. The Oxford Dictionary of Difficult Words. Oxford University Press, 2001.