Rijpma, E.
J.B .Wonters, 1947-48
Buku Teks
van Vriesland, Victor E.
Querido, 1953
Buku Teks
Lambert, Stephen E.
VGM Career Horizons Illinois: VGM Career Horizon, 1999, 1998
Buku Teks
Algra, N.E., author
H. D. Tjeenk Willink, 1977
Buku Teks
Amarulla Octavian, author
UI Press, 2012
Buku Teks