APA (7th ed.) Citation

quirk, r. (2006). Longman dictionary of contemporary English (Fourth edition.). Longman.

Chicago Style (17th ed.) Citation

quirk, randolph. Longman Dictionary of Contemporary English. Fourth edition. Harlow, English: Longman, 2006.

MLA (8th ed.) Citation

quirk, randolph. Longman Dictionary of Contemporary English. Fourth edition. Longman, 2006.

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