APA (7th ed.) Citation

De Leon, H. S. (2003). The law on obligations and contracts (1999 Rev. ed.). Rex Book Store.

Chicago Style (17th ed.) Citation

De Leon, Hector S. The Law on Obligations and Contracts. 1999 Rev. ed. Manila: Rex Book Store, 2003.

MLA (9th ed.) Citation

De Leon, Hector S. The Law on Obligations and Contracts. 1999 Rev. ed. Rex Book Store, 2003.