Illinois Institute for Continuing Legal Education. (1983). Environmental law. Illinois Institute for Continuing Legal Education.
Chicago-referens (17:e uppl.)Illinois Institute for Continuing Legal Education. Environmental Law. Springfield, Ill.: Illinois Institute for Continuing Legal Education, 1983.
MLA-referens (8:e uppl.)Illinois Institute for Continuing Legal Education. Environmental Law. Illinois Institute for Continuing Legal Education, 1983.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.