APA (7th ed.) Citation

Author's, Gray, J. C., & Gray, R. (1948). Nature and sources of the law from the author's notes (2nd ed.). Macmillan.

Chicago Style (17th ed.) Citation

Author's, John Chipman Gray, and Roland Gray. Nature and Sources of the Law from the Author's Notes. 2nd ed. New York: Macmillan, 1948.

MLA (9th ed.) Citation

Author's, et al. Nature and Sources of the Law from the Author's Notes. 2nd ed. Macmillan, 1948.