Cita APA (7th ed.)

Nicholson, M. (1957). A dictionary of american - english usage. Oxford University.

Cita Chicago (17th ed.)

Nicholson, Margaret. A Dictionary of American - English Usage. Nueva York: Oxford University, 1957.

Cita MLA (9th ed.)

Nicholson, Margaret. A Dictionary of American - English Usage. Oxford University, 1957.