APA-referens (7:e uppl.)
Simmons, I. (1991). Earth, air and water: Resources and environment in the late 20th century. Edward Arnold.
Chicago-referens (17:e uppl.)
Simmons, I.G. Earth, Air and Water: Resources and Environment in the Late 20th Century. London: Edward Arnold, 1991.
MLA-referens (9:e uppl.)
Simmons, I.G. Earth, Air and Water: Resources and Environment in the Late 20th Century. Edward Arnold, 1991.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.