APA (7th ed.) Citation

Quirk, R. (1985). A Comprehensive grammar of the English language. Longman.

Chicago Style (17th ed.) Citation

Quirk, Randolph. A Comprehensive Grammar of the English Language. London: Longman, 1985.

MLA (9th ed.) Citation

Quirk, Randolph. A Comprehensive Grammar of the English Language. Longman, 1985.