Guffey, Mary Ellen. Essentials of business communication / Mary Ellen Guffey, Dana Loewy. - 9th ed. - Mason, Ohio : South-Western, Cengage Learning, c2013. - xxiv, 484, [76] p. : ill. (some col.) ; 28 cm. Includes bibliographical references and index. ISBN: 9781111821227 (pbk.) 1111821224 (pbk.) 9781111821234 (student ed.) 1111821232 (student ed.) Subjects--Topical Terms: Business writing.English language--Business English.Business communication. Dewey Class. No.: 808.06665 / GUF 2013