Cita APA (7a ed.)

Hobson, A. e. (2001). The Oxford dictionary of difficult words. O.U.P.

Cita Chicago Style (17a ed.)

Hobson, Archie ed. The Oxford Dictionary of Difficult Words. New York: O.U.P, 2001.

Cita MLA (9a ed.)

Hobson, Archie ed. The Oxford Dictionary of Difficult Words. O.U.P, 2001.