United States. (1991). Selected environmental law statutes (1991-92 educational ed.). West Pub. Co.
Chicago-referens (17:e uppl.)United States. Selected Environmental Law Statutes. 1991-92 educational ed. St. Paul, Minn: West Pub. Co, 1991.
MLA-referens (9:e uppl.)United States. Selected Environmental Law Statutes. 1991-92 educational ed. West Pub. Co, 1991.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.