APA (7th ed.) Citation

Longman & Adam, J. H. (1989). Longman dictionary of business English (2nd ed.). Longman.

Chicago Style (17th ed.) Citation

Longman and J. H. Adam. Longman Dictionary of Business English. 2nd ed. Essex: Longman, 1989.

MLA (8th ed.) Citation

Longman and J. H. Adam. Longman Dictionary of Business English. 2nd ed. Longman, 1989.