APA (7th ed.) Citation

Greenbaum, S., & Whitcut, J. (1988). Longman guide to English usage. Longman.

Chicago Style (17th ed.) Citation

Greenbaum, Sidney, and Janet Whitcut. Longman Guide to English Usage. Essex, England: Longman, 1988.

MLA (9th ed.) Citation

Greenbaum, Sidney, and Janet Whitcut. Longman Guide to English Usage. Longman, 1988.