Horowitz, David, author
Praeger, 1972
Buku Teks
Asia Publishing , 1961
Buku Teks
[publisher not identified], 2000
Buku Teks
Adelman, Irma, author
Stanford University Press , 1973
Buku Teks
Avramovic, Dragoslav
The Johns Hopkins Press , 1964
Buku Teks