APA (7th ed.) Citation

Quirk, R., & Greenbaum, S. (1981). A university grammar of english. Longman Group Ltd.

Chicago Style (17th ed.) Citation

Quirk, Randolph, and Sidney Greenbaum. A University Grammar of English. Longman Group Ltd, 1981.

MLA (8th ed.) Citation

Quirk, Randolph, and Sidney Greenbaum. A University Grammar of English. Longman Group Ltd, 1981.

Warning: These citations may not always be 100% accurate.