Παραπομπή σε μορφή APA (7η εκδ.)

Norton, B. G. (1988). The preservation of species: The value of biological diversity. Princeton University Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Norton, Bryan G. The Preservation of Species: The Value of Biological Diversity. Princeton, N.J.: Princeton University Press, 1988.

Παραπομπή σε μορφή MLA (9th εκδ.)

Norton, Bryan G. The Preservation of Species: The Value of Biological Diversity. Princeton University Press, 1988.