Verzosa, Debbie Marie B. Pre-calculus / Debbie Marie B. Verzosa, Richard B. Eden, and Ian June L. Garces - Quezon City Vibal Group, Inc. c2016. - 230 p. ISBN: 978-971-07-3569-3 Subjects--Topical Terms: Geometry.Trigonometry. Dewey Class. No.: Res 516 V629 2016 c.1