Cita APA (7th ed.)

Hobson, A. (2003). The Oxford Dictionary of Difficult Words. Oxford.

Cita Chicago (17th ed.)

Hobson, Archie. The Oxford Dictionary of Difficult Words. New Delhi: Oxford, 2003.

Cita MLA (9th ed.)

Hobson, Archie. The Oxford Dictionary of Difficult Words. Oxford, 2003.