Não informado. (1986). Water & wastewater international. PY Publishing.
Style de citation Chicago (17e éd.)Não informado. Water & Wastewater International. Houston, Tex: PY Publishing, 1986.
Style de citation MLA (8e éd.)Não informado. Water & Wastewater International. PY Publishing, 1986.
Attention : ces citations peuvent ne pas être correctes à 100%.