Παραπομπή σε μορφή APA (7η εκδ.)

Krutilla, J. V. (1972). Natural environents: Studies in theoretical and applied analysis. Resources for the Future by Johns Hopkins Press University Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Krutilla, John V. Natural Environents: Studies in Theoretical and Applied Analysis. Baltimore: Resources for the Future by Johns Hopkins Press University Press, 1972.

Παραπομπή σε μορφή MLA (9th εκδ.)

Krutilla, John V. Natural Environents: Studies in Theoretical and Applied Analysis. Resources for the Future by Johns Hopkins Press University Press, 1972.