Macabuhay, Cynthia H. Effective business letters & communication / - Mandaluyong City : National Book Store, c2009. - xii, 198 p. ; 22 cm. Includes bibliographical references. ISBN: 9710869027 Subjects--Topical Terms: 1. Business letters. 2. Communication. Dewey Class. No.: Fil. 651.74 M114e 2009