Sirug, Winston S. Mathematics of investment / - Manila : Mindshapers Co., Inc., c2007. - x, 308 p. : ill. ; 22 cm. Includes bibliographical references. ISBN: 9789710445189 Subjects--Topical Terms: 1. Annuities. 2. Business mathematics. Dewey Class. No.: Fil. 511 S619m 2007