Citazione APA

Ricklefs, R. E. (2001). The economy of nature (5th ed.). W.H. Freeman.

Stile di citazione Chicago

Ricklefs, Robert E. The Economy of Nature. 5th ed. New York: W.H. Freeman, 2001.

Citazione MLA

Ricklefs, Robert E. The Economy of Nature. 5th ed. W.H. Freeman, 2001.