Torres, J. P. (1981). Obligations and contracts: With introduction to law (8th ed.). Booksellers.
Chicago-referens (17:e uppl.)Torres, Justo P. Obligations and Contracts: With Introduction to Law. 8th ed. Manila: Booksellers, 1981.
MLA-referens (9:e uppl.)Torres, Justo P. Obligations and Contracts: With Introduction to Law. 8th ed. Booksellers, 1981.
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