APA (7th ed.) Citation

Longman. (2003). Longman dictionary of contemporary English (new ed.). Longman.

Chicago Style (17th ed.) Citation

Longman. Longman Dictionary of Contemporary English. new ed. [New York]: Longman, 2003.

MLA (8th ed.) Citation

Longman. Longman Dictionary of Contemporary English. new ed. Longman, 2003.