Lua APA (7ú heag.)

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

Lua i Stíl Chicago (17ú heag.)

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

Lua MLA (9ú heag.)

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

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