Bernacchi, Richard L.
Data processing contracts and the law
Brown and Company, 1974
Buku Teks
Eisenberg, Melvin A.
Contracts Gilbert law summaries
Harcourt Brace, 1994
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Hunter, Howard O.
Modern Law of Contracts
Gorham & Lamont, 1987
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Simpson, Laurence P.
Handbook of the law of contracts
West Publishing, 1954
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Rayner, Susan E.
The Theory of contracts in Islamic law
Graham Trotman, 1991
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