Citazione Stile APA (7a Edizione)

De Leon, H. S. (1989). The law on obligations and contracts (Rev. ed.). Rex Book Store.

Citazione stile Chigago Style (17a edizione)

De Leon, Hector S. The Law on Obligations and Contracts. Rev. ed. Manila: Rex Book Store, 1989.

Citatione MLA (9a ed.)

De Leon, Hector S. The Law on Obligations and Contracts. Rev. ed. Rex Book Store, 1989.