Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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