APA استشهاد

Gray, J. C. (1963). The nature and sources of the law (2nd ed.). Beacon Press.

استشهاد بنمط شيكاغو

Gray, John Chipman. The Nature and Sources of the Law. 2nd ed. Boston: Beacon Press, 1963.

MLA استشهاد

Gray, John Chipman. The Nature and Sources of the Law. 2nd ed. Beacon Press, 1963.