Cita APA (7th ed.)

Bormann, F. H., & Kellert, S. R. (1991). Ecology, economics, ethics: The broken circle. Yale University Press.

Cita Chicago (17th ed.)

Bormann, F. Herbert, i Stephen R. Kellert. Ecology, Economics, Ethics: The Broken Circle. New Haven: Yale University Press, 1991.

Cita MLA (9th ed.)

Bormann, F. Herbert, i Stephen R. Kellert. Ecology, Economics, Ethics: The Broken Circle. Yale University Press, 1991.