APA (7th ed.) Citation

Guffey. (2005). Professional English. Thomson/South-Western.

Chicago Style (17th ed.) Citation

Guffey. Professional English. Mason, Ohio: Thomson/South-Western, 2005.

MLA (9th ed.) Citation

Guffey. Professional English. Thomson/South-Western, 2005.

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