Duchacek, Ivo D., author
Holt, Rinehart and Winston, 1965
Buku Teks
Morgenthau, Hans J., author
Knopf , 1954
Buku Teks
Kyung Hee University Press , 1983
Buku Teks
Frederick A. Praeger, 1960
Buku Teks
Perkins, Dexter
Indiana University Press, 1963
Buku Teks