Annual report 1999 : The OPEC fund for International development
The OPEC Fund for International Development, 2000
 Buku Teks
Water resources management
The World Bank, 1993
 Buku Teks
Husain, S.K.
Text book of water supply and sanitary engineering / S.K. Husain
Oxford & IBH Publishing Co., 1982
 Buku Teks
Kalbermatten, John M.
Appropriate technology for water supply and sanitation : a sanitation field manual / John M. Kalbermatten, DeAnne S. Julius, Charles G. Gunnerson
The World Bank, 1980
 Buku Teks
Water resources management: A World Bank Policy Paper
Washington The World Bank 1993,
 Buku Teks
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