APA (7th ed.) Citation

De Leon, H. S. (1977). Handbook on obligations and contracts. s.n.].

Chicago Style (17th ed.) Citation

De Leon, Hector S. Handbook on Obligations and Contracts. [S.l: s.n.], 1977.

MLA (9th ed.) Citation

De Leon, Hector S. Handbook on Obligations and Contracts. s.n.], 1977.