Não informado. (1990). Research Journal of the Water Pollution Control Federation. Water Pollution Control Federation.
Cita Chicago Style (17a ed.)Não informado. Research Journal of the Water Pollution Control Federation. Alexandria, Va: Water Pollution Control Federation, 1990.
Cita MLA (8a ed.)Não informado. Research Journal of the Water Pollution Control Federation. Water Pollution Control Federation, 1990.
Precaución: Estas citas no son 100% exactas.