Cabrera, Lucila D.M./ De Asis. Belen Z. Essentials of research and business correspondence / Cabrera, Lucila D.M./ De Asis. Belen Z. - Manila Booklore Publishing Corporation 2009 - iv, 237p.; ill.; 22cm ISBN: 9789718171479 97897718171479 Subjects--Topical Terms: Commercial correspondence--Research--Research