APA (7th ed.) Citation

Hornby, A. S., Bradbury, J., Deuter, M., & Turnbull, J. Oxford advanced learner's dictionary of current English (9th ed.).

Chicago Style (17th ed.) Citation

Hornby, Albert Sydney, Jennifer Bradbury, Margaret Deuter, and Joanna Turnbull. Oxford Advanced Learner's Dictionary of Current English. 9th ed.

MLA (8th ed.) Citation

Hornby, Albert Sydney, et al. Oxford Advanced Learner's Dictionary of Current English. 9th ed.