Roucek, Joseph S., author
Stanford University Press, 1949
Buku Teks
edited by Dušan I. Bjelić and Obrad Savić
MIT Press, 2002
Buku Teks
Jones, S. W, author
Ryal Institute of International Affairs, 1953
Buku Teks
Riker, T.W.
Oxford University Press , 1931
Buku Teks
Stoyan, P. B.
Foreign Policy Association, 1940
Buku Teks