Não informado. (2004). EDS: Environmental Data Service. Environmental Data Service.
Cita Chicago Style (17a ed.)Não informado. EDS: Environmental Data Service. Washington: Environmental Data Service, 2004.
Cita MLA (8a ed.)Não informado. EDS: Environmental Data Service. Environmental Data Service, 2004.
Precaución: Estas citas no son 100% exactas.