APA aipamena

George, R. P. (2001). In defense of natural law. Oxford: Oxford University Press.

Chicago Style aipamena

George, Robert P. In Defense of Natural Law. Oxford: Oxford University Press, 2001.

MLA aipamena

George, Robert P. In Defense of Natural Law. Oxford: Oxford University Press, 2001.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.