APA (7th ed.) Citation

Guffey, M. E. (2005). Professional english. Thomson South Western.

Chicago Style (17th ed.) Citation

Guffey, Mary Ellen. Professional English. Ohio: Thomson South Western, 2005.

MLA (9th ed.) Citation

Guffey, Mary Ellen. Professional English. Thomson South Western, 2005.

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