Valencia, Edwin G. Income taxation: principles and laws with accounting applications/ Edwin G. Valencia and Gregorio F. Roxas. - 4th Edition - Baguio City: Valencia Educational Supply, c2007. - 604 pages: illustrations; 24 cm. ISBN: 978-971-92726-7-0 Subjects--Topical Terms: Income tax--Law and legislation--Philippines Dewey Class. No.: DFil 336.24 / V23i