APA (7th ed.) Citation

HORNBY. (1989). Oxford advanced learner's dictionary of current English (4th.ed.). Oxford University Press.

Chicago Style (17th ed.) Citation

HORNBY. Oxford Advanced Learner's Dictionary of Current English. 4th.ed. Oxford: Oxford University Press, 1989.

MLA (8th ed.) Citation

HORNBY. Oxford Advanced Learner's Dictionary of Current English. 4th.ed. Oxford University Press, 1989.