Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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