Cita APA (7a ed.)

Ricklefs, R. E. (1993). The economy of nature: A textbook in basic ecology (Third edition.). W.H. Freeman and Company.

Cita Chicago Style (17a ed.)

Ricklefs, Robert E. The Economy of Nature: A Textbook in Basic Ecology. Third edition. New York, N. Y: W.H. Freeman and Company, 1993.

Cita MLA (9a ed.)

Ricklefs, Robert E. The Economy of Nature: A Textbook in Basic Ecology. Third edition. W.H. Freeman and Company, 1993.