Calamari, John D.
Contracts
West Publishing, 1987
Buku Teks
Eisenberg, Melvin A.
Contracts Gilbert law summaries
Harcourt Brace, 1994
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Farnsworth, E. Allan
Contracts
Little, Brown, 1990
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Emanuel, Steven
Contracs
Larchmont, 1993
Buku Teks
Schaber, Gordon D.
Contracts in a nutshell
West Publishing, 1990
Buku Teks