Thompson, Warren S.
The University of Chicago Press, 1968
Buku Teks
Clyde, Paul Hibbert
Prentice-Hall, 1953
Buku Teks
Walker, Allan S.
Australian War Memorial, 1956
Buku Teks
Latourette, Kenneth Scott
Macmillan, 1957
Buku Teks
Christopher, James W.
E.J. Brill, 1928
Buku Teks