National Service Center for Environmental Publications. (2002). Drinking Water from Household Wells: National Service Center for Environmental Publications. United States Environmental Protection Agency.
Cita Chicago Style (17a ed.)National Service Center for Environmental Publications. Drinking Water from Household Wells: National Service Center for Environmental Publications. Estados Unidos de América: United States Environmental Protection Agency, 2002.
Cita MLA (8a ed.)National Service Center for Environmental Publications. Drinking Water from Household Wells: National Service Center for Environmental Publications. United States Environmental Protection Agency, 2002.
Precaución: Estas citas no son 100% exactas.