Eisenberg, Melvin A.
Contracts Gilbert law summaries
Harcourt Brace, 1994
 Buku Teks
Calamari, John D.
Contracts
West Publishing, 1987
 Buku Teks
Calamari, John D.
Contracts
West Publishing, 1990
 Buku Teks
Levin, Jonathan L.
The banking law reference guide for national banks
Institute Finance, 1991
 Buku Referensi
Whaley, Douglas J.
Gilbert law summaries: sale & lease of goods / Douglas J. Whaley
Harcourt Brace & Company, 1992
 Buku Teks