edited by American Writing Corporation
The World Bank , 1996
Buku Teks
Avramovic, Dragoslav, author
John Hopkins Press, 1972
Buku Teks
Muscat, Robert J., author
Praeger, 1966
Buku Teks
Horowitz, David, author
Praeger, 1972
Buku Teks
Ohlin, Goran
OEDC, 1967
Buku Teks