APA (7th ed.) Citation

Quirk & Greenbaum. (1979). A University grammar of english. Longman Group Limited.

Chicago Style (17th ed.) Citation

Quirk and Greenbaum. A University Grammar of English. London: Longman Group Limited, 1979.

MLA (8th ed.) Citation

Quirk and Greenbaum. A University Grammar of English. Longman Group Limited, 1979.