Cita APA (7th ed.)

De Leon, H. S., & De Leon, H. M. (2000). Comments and cases on obligations and contracts (3rd ed.). Rex Book Store.

Cita Chicago (17th ed.)

De Leon, Hector S., i Hector M. De Leon. Comments and Cases on Obligations and Contracts. 3rd ed. Manila: Rex Book Store, 2000.

Cita MLA (9th ed.)

De Leon, Hector S., i Hector M. De Leon. Comments and Cases on Obligations and Contracts. 3rd ed. Rex Book Store, 2000.