APA (7th ed.) Citation

De Leon, H. S. (1974). The law on obligations and contracts. s.n.].

Chicago Style (17th ed.) Citation

De Leon, Hector S. The Law on Obligations and Contracts. [Manila: s.n.], 1974.

MLA (9th ed.) Citation

De Leon, Hector S. The Law on Obligations and Contracts. s.n.], 1974.