APA (7th ed.) Citation

Hornby, A. S. (2015). Oxford Advanced Learner's Dictionary: Of current English (9th ed.). Oxford University Press.

Chicago Style (17th ed.) Citation

Hornby, A. S. Oxford Advanced Learner's Dictionary: Of Current English. 9th ed. Oxford: Oxford University Press, 2015.

MLA (9th ed.) Citation

Hornby, A. S. Oxford Advanced Learner's Dictionary: Of Current English. 9th ed. Oxford University Press, 2015.