APA (7th ed.) Citation

Ricklefs, R. E. (1990). The economy of nature: A textbook in basic ecology (2nd ed.). W. H. Freeman.

Chicago Style (17th ed.) Citation

Ricklefs, Robert E. The Economy of Nature: A Textbook in Basic Ecology. 2nd ed. New York: W. H. Freeman, 1990.

MLA (9th ed.) Citation

Ricklefs, Robert E. The Economy of Nature: A Textbook in Basic Ecology. 2nd ed. W. H. Freeman, 1990.