Franklin

MLA

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

APA

Ávila, H. Bergmann. (2007). Theory of legal principles. Dordrecht: Springer.

Chicago

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