De Leon, Hector S. Administrative law : text and cases / by Hector S. De Leon and Hector M. De Leon, Jr. - 6th ed. - Manila : Rex Book Store, c2010. - xi, 460 p. ISBN: 9789712356704 Subjects--Topical Terms: Administrative law--Philippines. LC Class. No.: KF 5624.2 / A1 D45 2010