editor, Frank N. Magill
Fitzroy Dearborn Publishers, 1997
Buku Referensi
Grolier Incorporated, 1990
Buku Referensi
edited by P.J.N. Pells
A.A. Balkema, 1980
Buku Teks
Burgh, W.G. (William George) De, 1866-1943, author
Penguin Books, 1953
Buku Teks
Neale, J. E., author
Alden Press, 1950
Buku Referensi