Kennedy, Paul M
Vintage Books, 1993
Buku Teks
Gilchrist, Gavin, author
Allen & Unwin, 1994
Buku Teks
Athayde, Austregesilo de, author
I.B. Tauris , 2009
Buku Teks
Stachokas, George, author
Chandos, 2014
eBooks
Heye, Dennie, author
Chandos Publishing, 2006
Buku Teks