Morehead, Albert H.. author
A Signet Book, 1962
Buku Referensi
Simanjuntak, Herpinus, author
Kesaint Blanc, 2012
Buku Referensi
Peltzer, Karl, author
Ott Verlag Thun, 1966
Buku Referensi
Sterkenburg, P.G.J. van, author
Van Dale Lexicografie, 1991
Buku Referensi
Reinsma, Riemer, author
Het Spectrum, 1993
Buku Referensi