Cita APA (7th ed.)
Hay, J. (2007). In defense of nature (1st University of Iowa Press ed.). University of Iowa Press.
Cita Chicago (17th ed.)
Hay, John. In Defense of Nature. 1st University of Iowa Press ed. Iowa City: University of Iowa Press, 2007.
Cita MLA (9th ed.)
Hay, John. In Defense of Nature. 1st University of Iowa Press ed. University of Iowa Press, 2007.
Atenció: Aquestes cites poden no estar 100% correctes.