APA (7th ed.) Citation

Harmby, A. S. (2005). Oxford advances learner's dictionary of current english (7ª ed.). Oxford University Press.

Chicago Style (17th ed.) Citation

Harmby, A. S. Oxford Advances Learner's Dictionary of Current English. 7ª ed. New York: Oxford University Press, 2005.

MLA (9th ed.) Citation

Harmby, A. S. Oxford Advances Learner's Dictionary of Current English. 7ª ed. Oxford University Press, 2005.