APA (7th ed.) Citation

Greenbaum, S., & Whitcut, J. (1996). Longman Guide to English usage. Penguin Books.

Chicago Style (17th ed.) Citation

Greenbaum, Sidney, and Janet Whitcut. Longman Guide to English Usage. London [u.a.]: Penguin Books, 1996.

MLA (9th ed.) Citation

Greenbaum, Sidney, and Janet Whitcut. Longman Guide to English Usage. Penguin Books, 1996.