APA (7th ed.) Citation

(1997). Longman dictionary of American English: Your complete guide to American English. Longman.

Chicago Style (17th ed.) Citation

Longman Dictionary of American English: Your Complete Guide to American English. White Plains, N.Y.: Longman, 1997.

MLA (9th ed.) Citation

Longman Dictionary of American English: Your Complete Guide to American English. Longman, 1997.