Marble, Allan Everett
Lancelot Press, 1977
Buku Teks
Ende, Michael
Psuchogios, 1984
Buku Teks
Glenne, Michael
Roy Publishers, [date of publication not identified]
Buku Teks
LaFeber, Walter
Jendela, 2003
Buku Teks
Roberts, Chris, 1959-
Carlton Books, 2014
Buku Referensi