APA (7e ed.) Bronvermelding

Torres, J. P. (1981). Obligations and contracts: With introduction to law (8th ed.). Booksellers.

Chicago (17e ed.) Bronvermelding

Torres, Justo P. Obligations and Contracts: With Introduction to Law. 8th ed. Manila: Booksellers, 1981.

MLA (9e ed.) Bronvermelding

Torres, Justo P. Obligations and Contracts: With Introduction to Law. 8th ed. Booksellers, 1981.