Calamari, John D.
Contracts
West Publishing, 1990
 Buku Teks
Calamari, John D.
Contracts
West Publishing, 1987
 Buku Teks
Schaber, Gordon D.
Contracts in a nutshell
West Publishing, 1990
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Waddams, S.M., editor
The Law of Contracts
Canada Law Book INC, 1984
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Hinze, Jimmie W.
Construction contracts
McGraw-Hill, 2011
 Buku Teks