Thompson, Warren S.
The University of Chicago Press, 1959
Buku Teks
Thompson, Warren S.
Tata McGraw-Hill, 1965
Buku Teks SO
Clyde, Paul Hibbert
Prentice-Hall, 1953
Buku Teks
Walker, Allan S.
Australian War Memorial, 1956
Buku Teks
Pergamon Press, 1973
Buku Teks