^ ab"Ley Núm. 171 de Junio 30 de 1968" [Law No. 171 of 30 June 1968] (PDF). Portal Oficial del Gobierno de Puerto Rico (in Spanish). Government of Puerto Rico. 30 June 1968. Archived from the original(PDF) on 4 March 2016.
^ ab"Sustitutivo al (P. del S. 4): LEY 5" [Substitute for (P. of S. 4): LAW 5] (PDF), Oficina de Servicios Legislativos, Asamblea Legislativa de Puerto Rico [Legislative Services Office, Legislative Assembly of Puerto Rico] (in Spanish), Government of Puerto Rico, 6 April 1993, archived from the original(PDF) on 2 October 2017