Hunter, Guy
Oxford University Press, 1969
Buku Teks
Toho Gakkai , 1983
Buku Referensi
Wriggins, W. Howard
Columbia University Press, 1969
Buku Teks
Brion, Marcel, 1895-1984, author
Macmillan, 1961
Buku Teks
South African Institute of International Affairs , 2001
Buku Teks