McAllister, Donald M., author
MIT Press, 1995
Buku Teks
editor, Gunter Schramm and Jeremy J. Warford
The World Bank, 1991
Buku Teks
Kahn, James R., author
Thomson, 2005
Buku Teks
Kluwer Academic Publishers, 1999
Buku Teks
Bonnes, Mirilia, author
Sage, 1995
Buku Teks