APA (7th ed.) Citation

Gray, J. C. (1972). The nature and sources of the law (2.ed.). Smith.

Chicago Style (17th ed.) Citation

Gray, John Chipman. The Nature and Sources of the Law. 2.ed. Gloucester, Mass: Smith, 1972.

MLA (9th ed.) Citation

Gray, John Chipman. The Nature and Sources of the Law. 2.ed. Smith, 1972.