Torres, J. P. (1981). Obligations and contracts: With introduction to law (8th ed.). Booksellers.
芝加哥风格引文Torres, Justo P. Obligations and Contracts: With Introduction to Law. 8th ed. Manila: Booksellers, 1981.
MLA引文Torres, Justo P. Obligations and Contracts: With Introduction to Law. 8th ed. Booksellers, 1981.
警告：这些引文格式不一定是100％准确.