APA (7th ed.) Citation

Bull. (2014). Oxford: Learner's dictionary of. Oxford University Press.

Chicago Style (17th ed.) Citation

Bull. Oxford: Learner's Dictionary of. United Kingdom: Oxford University Press, 2014.

MLA (8th ed.) Citation

Bull. Oxford: Learner's Dictionary of. Oxford University Press, 2014.

Warning: These citations may not always be 100% accurate.