Calamari, John D.
The law of contracts
West Publishing, 1987
Buku Teks SO
Bernacchi, Richard L.
Data processing contracts and the law
Brown and Company, 1974
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Simpson, Laurence P.
Handbook of the law of contracts
West Publishing, 1954
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Farnsworth, E. Allan
Contracts
Little, Brown, 1990
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Burnham, Scott J.
Drafting contracts : a giude to the practical applicationof the principles of contract law
The Michie Company, 1993
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