APA (7th ed.) Citation

(1993). Longman handy learner's dictionary of American English. Longman.

Chicago Style (17th ed.) Citation

Longman Handy Learner's Dictionary of American English. New York: Longman, 1993.

MLA (9th ed.) Citation

Longman Handy Learner's Dictionary of American English. Longman, 1993.