APA (7th ed.) Citation

De Leon, H. S. (1969). 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, 1969.

MLA (9th ed.) Citation

De Leon, Hector S. The Law on Obligations and Contracts. s.n, 1969.