APA (7th ed.) Citation

Quirk, R. (1972). A Grammar of contemporary English. Longman.

Chicago Style (17th ed.) Citation

Quirk, Randolph. A Grammar of Contemporary English. [London]: Longman, 1972.

MLA (8th ed.) Citation

Quirk, Randolph. A Grammar of Contemporary English. Longman, 1972.

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