Estrada, A. (1950). The philosophy of law. University Pub. Co.
Cita Chicago (17th ed.)Estrada, Antonio. The Philosophy of Law. Manila: University Pub. Co, 1950.
Cita MLA (9th ed.)Estrada, Antonio. The Philosophy of Law. University Pub. Co, 1950.
Atenció: Aquestes cites poden no estar 100% correctes.