Hudson, Valerie M., 1958-, author
Rowman and Littlefield, 2014
Buku Teks
Modelski, George, author
Frederick A. Praeger, 1962
Buku Teks
Hyman, David N., author
Cengage Learning, 2014
Buku Teks
edited by James N. Rosenau
Free Press, 1961
Buku Teks
Duetsch, Karl W.
Stanford University Press, 1959
Buku Teks