APA-referens (7:e uppl.)

U.S. Environmental Protection Agency. Chemical accidents from electric power outages.

Chicago-referens (17:e uppl.)

U.S. Environmental Protection Agency. Chemical Accidents from Electric Power Outages.

MLA-referens (9:e uppl.)

U.S. Environmental Protection Agency. Chemical Accidents from Electric Power Outages.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.