by Robert Bartley [and others]
ISEAS, 1994
Buku Teks
edited by Pieter J.D. Drenth, Joseph A. Sergeant, Roelf J. Takens
John Wiley & Sons, 1990
Buku Teks
Jens Damm
VS Verlag, 2012
eBooks
edited by Wim Stokhof, Paul van der Velde
Curzon Press, 2001
Buku Teks
Andreas Vassilopoulos, Niki Evelpidou, Oliver Bender, Alenka Krek, editor
CRC Press, 2009
Buku Teks