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Buku Referensi
edited by Matt Bonass, Michael Rudd
Globe Law and Business, 2010
Buku Teks
ed. by Michael J. Kennish
CRC Press, 1994
Buku Referensi
McPartland, Joseph F.
McGraw-Hill, 1984
Buku Referensi
Douglas-Young, John
Parker Publishing Company, 1979
Buku Referensi