De Leon, Hector S. Comments and cases on obligations and contracts / by Hector S. De Leon and Hector M. De Leon, Jr. - 5th ed. - Manila : Rex Book Store, 2010. - xxxv, 872 p. 24 cm. ISBN: 9789712350740 Subjects--Topical Terms: Obligations (Law)--Philippines. Contracts--Philippines. LC Class. No.: KF5625.2 / D45 2010