Brugmans, H., author
Scheltens & Giltay, [Date of publication not identified]
Buku Teks
Dam, Arend van
Van Holkema & Warendorf, 2008
Buku Teks
Loerakker, Co
Big Balloon Publishers, 1999
Buku Teks
Lademacher, Horst
AULA, 1993
Buku Teks
Ham, Gijs van der, author
SUN, 2004
Buku Teks