APA (7th ed.) Citation

Quirk, R., & Crystal, D. (1985). A Comprehensive grammar of the English language / Randolph Quirk ... (et al.) ; index by David Crystal. Longman.

Chicago Style (17th ed.) Citation

Quirk, Randolph, and David Crystal. A Comprehensive Grammar of the English Language / Randolph Quirk ... (et Al.) ; Index by David Crystal. London: Longman, 1985.

MLA (9th ed.) Citation

Quirk, Randolph, and David Crystal. A Comprehensive Grammar of the English Language / Randolph Quirk ... (et Al.) ; Index by David Crystal. Longman, 1985.

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