United States. Environmental Protection Agency. (2005). Site characterization library: Version 3.0. Environmental Protection Agency.
Chicago-referens (17:e uppl.)United States. Environmental Protection Agency. Site Characterization Library: Version 3.0. Cincinnati, OH: Environmental Protection Agency, 2005.
MLA-referens (9:e uppl.)United States. Environmental Protection Agency. Site Characterization Library: Version 3.0. Environmental Protection Agency, 2005.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.