Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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