Carter, Gwendolen M., author
Praeger, 1973
Buku Teks
Ball, Alan R., author
Macmillan, 1974
Buku Teks
Institute of International Relations, National Chengchi University, 1988
Buku Teks
Roelofs, H. Mark
The Dorsey press, 1968
Buku Teks
Brecht, Arnold, author
Princenton University Press, 1968
Buku Teks