Cita APA (7th ed.)

Raz, J. (1980). The concept of a legal system: An introduction to the theory of legal system (2nd ed.). Oxford University Press.

Cita Chicago (17th ed.)

Raz, Joseph. The Concept of a Legal System: An Introduction to the Theory of Legal System. 2nd ed. Oxford: Oxford University Press, 1980.

Cita MLA (9th ed.)

Raz, Joseph. The Concept of a Legal System: An Introduction to the Theory of Legal System. 2nd ed. Oxford University Press, 1980.