Guffey, Mary Ellen. Essentials of business communication / Mary Ellen Guffey ; Dana Loewy, contributing editor. - 8th ed. - Mason, OH : South-Western/Cengage Learning, c2010. - 1 v. (various pagings) : ill. ; 28 cm. Includes bibliographical references and index. ISBN: 9780324588002 (pkg. : pbk.) 0324588003 (pkg. : pbk.) 9780324587999 0324587996 0324013620 0324013639 LCCN: 2008940428 Subjects--Topical Terms: Business writing.English language--Business English.Business communication. LC Class. No.: HF5718.3 / .G84 2010