Holsti, Kalevi J., author
Prentice-Hall, 1992
Buku Teks
Reynolds, P.A., author
Longman, 1994
Buku Teks
edited by Klaus Knorr and James N. Rosenau
Priceton University Press, 1969
Buku Teks
edited by William T.R. Fox
Indiana University of Notre Dame Press , 1959
Buku Teks
edited by Andrew Gyorgy and Hubert S. Gibbs
Prentice-Hall, 1955
Buku Teks