Heldeweg, Michiel A, author
Wolters Kluwer Law & Business, 2012
Buku Teks
Jansen, Ernst P., author
Kluwer, 1994
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Kortmann, C.A.J.M., author
Kluwer Law International, 2007
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Rodgers, William H., author
West Publishing, 1994
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Kubasek, Nancy K., author
Pearson - Prentice Hall, 2005
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