De Leon, Hector S. Constitution made simple / by Hector S. De Leon and Hector M. De Leon, Jr. - 4th edition - Quezon City : Rex Printing Company, Inc., 2013. - xxxix, 340 pages ; 23 cm. ISBN: 9789712364570 Pbk. Np. Subjects--Topical Terms: Constitutional law Philippines. Constitution Philippines. LC Class. No.: KPM 1744 D442 2013 F