Allen, G.C.
Oxford University Press, 1966
Buku Teks
Bisson, T.A.
Institute of Pasific Ralations , 1945
Buku Teks
Dempster, Prue
Methuen & Co., 1971
Buku Teks
Lockwood, William W.
Princeton Princeton University Press , 1954
Buku Teks
Kojima, Kiyoshi
Croom Helm, 1977
Buku Teks