Cole, John, author
BBC Book 1987, 1987
Buku Teks
Emden, Cecil S.
At The Clarendon Press, 1956
Buku Teks
Wynot, Edward D., author
University of Georgia Press, 1974
Buku Teks
Fukuyama, Francis, author
Farrar, Straus and Giruox, 2012
Buku Teks
Burns, Danny, 1964-, author
Macmillan, 1994
Buku Teks