Waddams, S.M.
The Law of Contracts
Canada Law Book INC, 1984
 Buku Teks
Calamari, John D.
The law of contracts
West Publishing, 1987
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Bernacchi, Richard L.
Data processing contracts and the law
Brown and Company, 1974
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Eisenberg, Melvin A.
Contracts Gilbert law summaries
Harcourt Brace, 1994
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Simpson, Laurence P.
Handbook of the law of contracts
West Publishing, 1954
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