Guffey, Mary Ellen Business English / Mary Ellen Guffey and Carolyn M. Seefer - 11th ed. - Boston, Mass. : South Western/CENGAGE Learning, c2014. - xv, 495 p. ; ill. ; 28 cm. ISBN: 9781133627500 LCCN: Subjects--Topical Terms: English languageBusinessEnglish LC Class. No.: PE1115 / .G83 2014