APA (7th ed.) Citation

Swan, M. (2005). Practical english usage (3ª ed.). Oxford University.

Chicago Style (17th ed.) Citation

Swan, Michael. Practical English Usage. 3ª ed. Oxford: Oxford University, 2005.

MLA (9th ed.) Citation

Swan, Michael. Practical English Usage. 3ª ed. Oxford University, 2005.

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