APA (7th ed.) Citation

De Leon, H. S. (1980). The law on obligations and contracts. Rex Book Store.

Chicago Style (17th ed.) Citation

De Leon, Hector S. The Law on Obligations and Contracts. Manila: Rex Book Store, 1980.

MLA (9th ed.) Citation

De Leon, Hector S. The Law on Obligations and Contracts. Rex Book Store, 1980.