Guffey, Mary Ellen. Essentials of business communication . Mary Ellen Guffey, Dana Loewy. - 9th ed. - Mason, OH : South-Western Cengage Learning, 2013. - 1 v. (various pagings ) : ill. ; 28 cm. Paper Cover Includes bibliographical references and index. ISBN: 9781111821227 (pbk.) 1111821224 (pbk.) 9781111821234 (student ed.) 1111821232 (student ed.) LCCN: 2011944636 Subjects--Personal Names: Guffey, Mary Ellen. Subjects--Topical Terms: Business writing.English language--Business English.Business communication. LC Class. No.: HF5718.3 / .G84 2013 Dewey Class. No.: 808.06665