Não informado. (1989). Water Environment & Technology. Water Pollution Control Federation.
Cita Chicago Style (17a ed.)Não informado. Water Environment & Technology. Alexandria, Va: Water Pollution Control Federation, 1989.
Cita MLA (8a ed.)Não informado. Water Environment & Technology. Water Pollution Control Federation, 1989.
Precaución: Estas citas no son 100% exactas.