APA (7th ed.) Citation

Swan. (2006). Practical English usage (3.). Oxford University press.

Chicago Style (17th ed.) Citation

Swan. Practical English Usage. 3. NewDelhi: Oxford University press, 2006.

MLA (9th ed.) Citation

Swan. Practical English Usage. 3. Oxford University press, 2006.

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