ISBN 978-621-8402-36-2 (EPUB) ISBN 978-621-8402-38-6 (PDF read only) ISBN 978-621-8402-39-3 (PDF downloadable) Author Adrian Lawrence P. Carvajal, Richard D. Sanchez, Shielilo R. Amihan, Maricel Cabiling-Ramos, Raul G. Moldez