Sturm, Arie
Martinus Nijhoff, 1986
Buku Teks
Model, Jan
ICG Publication, 1991
Buku Teks
Haeseryn, Walter Jan Maria, author
[publisher not identified], 1990
Buku Teks
W.G. Vagting
H.D.Tjeenk Willink and Zoon N.V,, 1951
Buku Teks
Pitlo, Adriaan, author
Gouda Quint BV, 1981
Buku Teks