APA (7th ed.) Citation
Hornby, A., & Cowie, A. (1989). Oxford advanced learner's dictionary of current English (4.ed.). Oxford University Press.
Chicago Style (17th ed.) Citation
Hornby, A.S, and A.P Cowie. Oxford Advanced Learner's Dictionary of Current English. 4.ed. Oxford: Oxford University Press, 1989.
MLA (9th ed.) Citation
Hornby, A.S, and A.P Cowie. Oxford Advanced Learner's Dictionary of Current English. 4.ed. Oxford University Press, 1989.
Warning: These citations may not always be 100% accurate.