APA (7th ed.) Citation

Hart, H. L. A. (1961). The concept of law (2nd ed.). Oxfrod Univeristy press.

Chicago Style (17th ed.) Citation

Hart, H. L. A. The Concept of Law. 2nd ed. New york: Oxfrod Univeristy press, 1961.

MLA (9th ed.) Citation

Hart, H. L. A. The Concept of Law. 2nd ed. Oxfrod Univeristy press, 1961.