De Leon, H. S., & De Leon, H. M. J. (2014). Comments and cases on obligations and contracts (Sixth edition.). Rex Book Store.
Citace podle Chicago (17th ed.)De Leon, Hector S., a Hector M. Jr De Leon. Comments and Cases on Obligations and Contracts. Sixth edition. Manila: Rex Book Store, 2014.
Citace podle MLA (9th ed.)De Leon, Hector S., a Hector M. Jr De Leon. Comments and Cases on Obligations and Contracts. Sixth edition. Rex Book Store, 2014.
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