World Bank, 2003
Buku Teks
Azhar Kasim
Department of Administration Sciences, Faculty of Social and Political Sciences, University of Indonesia, 2013
Artikel Jurnal
Llamzon, Aloysius P.
Oxford University press, 2014
Buku Teks
Beck, Robert J.
Oxford University Press, 1996
Buku Teks
IMF , 1998
Buku Teks