APA-referens (7:e uppl.)
Hay, J. (2007). In defense of nature (1st University of Iowa Press ed.). University of Iowa Press.
Chicago-referens (17:e uppl.)
Hay, John. In Defense of Nature. 1st University of Iowa Press ed. Iowa City: University of Iowa Press, 2007.
MLA-referens (9:e uppl.)
Hay, John. In Defense of Nature. 1st University of Iowa Press ed. University of Iowa Press, 2007.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.