APA

Duke G., George R. P., . (2017). The cambridge companion to natural law jurisprudence. New York: Cambridge University Press.

Chicago

Duke George, George Robert P, . 2017. The cambridge companion to natural law jurisprudence. New York: Cambridge University Press.

Harvard

Duke G., George R. P., . (2017). The cambridge companion to natural law jurisprudence. New York: Cambridge University Press.

MLA

Duke George, George Robert P, . The cambridge companion to natural law jurisprudence. New York: Cambridge University Press. 2017.