APA (7th ed.) Citation

Greenbaum, S., & Quirk, R. (1990). A student's grammar of the English language. Longman.

Chicago Style (17th ed.) Citation

Greenbaum, Sidney, and Randolph Quirk. A Student's Grammar of the English Language. Harlow: Longman, 1990.

MLA (9th ed.) Citation

Greenbaum, Sidney, and Randolph Quirk. A Student's Grammar of the English Language. Longman, 1990.