Crewe, Sabrina, author
World Almanac Library, 2004
Buku Teks
Bullock, Freddy, author
MBI Publisher, 1998
Buku Teks
University of California Press, 1996
Buku Teks
Davis, Mike
Vintage Books, 1999
Buku Teks
Geel, Rudolf, author
Meulenhoff, 1994
Buku Teks