Cita APA (7th ed.)

Avila, H. B. (2007). Theory of legal principles. Springer.

Cita Chicago (17th ed.)

Avila, Humberto Bergmann. Theory of Legal Principles. Dordrecht: Springer, 2007.

Cita MLA (9th ed.)

Avila, Humberto Bergmann. Theory of Legal Principles. Springer, 2007.