Taylor, James, author
Grafton Books , 1988
Buku Referensi
Hutton, Christopher, author
Routledge, 1998
Buku Teks
d`Almeida, Fabrice, author
Polity Press, 2008
Buku Teks
Overy, R.J.
Oxford University Press , 1994
Buku Teks
Taylor, Telford
Quadrangle, 1952
Buku Teks