Guffey, Mary Ellen Essentials of business communication / Mary Ellen Guffey. - 5th ed. - Cincinnati, Ohio : South-Western College Pub., c2001. - xxi, 499 p. : ill. ; 28 cm. ISBN: 0324013620 Subjects--Topical Terms: Business communication.Business writing.English language--Business English. Dewey Class. No.: 808.06665 / GUF