APA (7th ed.) Citation

Hornby, A. S., & Cowie, A. P. (1989). Oxford advanced learner's dictionary: Of current english (4th ed.). Oxford university press.

Chicago Style (17th ed.) Citation

Hornby, A. S., and Anthony Paul Cowie. Oxford Advanced Learner's Dictionary: Of Current English. 4th ed. Oxford ; New York ; Toronto ; Delhi ;: Oxford university press, 1989.

MLA (8th ed.) Citation

Hornby, A. S., and Anthony Paul Cowie. Oxford Advanced Learner's Dictionary: Of Current English. 4th ed. Oxford university press, 1989.