APA (7th ed.) Citation

Watson, O. C. (1976). Longman modern English dictionary. Longman.

Chicago Style (17th ed.) Citation

Watson, O. C. Longman Modern English Dictionary. London: Longman, 1976.

MLA (9th ed.) Citation

Watson, O. C. Longman Modern English Dictionary. Longman, 1976.

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