Sengupta, Jati K., author
North-Holland Pub. Co, 1975
Buku Teks
Hickman, Bert G., author
The Brooking Institution , 1965
Buku Teks
Packer, Arnold H., author
MIT Press, 1972
Buku Teks
Allied Pub. , 1976
Buku Teks
Hamberg, Daniel, author
Harper & Row, 1971
Buku Teks