Cita APA (7a ed.)

Sadeleer, N. d. (2008). Environmental Principles. Oxford University Press.

Cita Chicago Style (17a ed.)

Sadeleer, Nicholas de. Environmental Principles. New York: Oxford University Press, 2008.

Cita MLA (9a ed.)

Sadeleer, Nicholas de. Environmental Principles. Oxford University Press, 2008.