Farnsworth, E. Allan
Contracts
Little, Brown, 1990
 Buku Teks
Kunz, Christina L.
Contracts : a contemporary approach
West Publishing, 2013
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Schaber, Gordon D.
Contracts in a nutshell
West Publishing, 1990
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Corbin, Arthur Linton, 1874-1967
Corbin on contracts
West Publishing, 1952
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Rohwer, Claude D.
Contracts in a nutshell
Thomson Reuters, 2010
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