Cita APA (7a ed.)

George, R. P. (2001). In defense of natural law (1rst published in paperback.). University Press.

Cita Chicago Style (17a ed.)

George, Robert P. In Defense of Natural Law. 1rst published in paperback. Oxford [etc.]: University Press, 2001.

Cita MLA (9a ed.)

George, Robert P. In Defense of Natural Law. 1rst published in paperback. University Press, 2001.