Shenk, E. 2015. Puerto Rico and the United States: The Inclusion and Evolution of Language Policy in U.S. Congressional Bills, 1989-2010: PUERTO RICO AND THE UNITED STATES: THE INCLUSION AND EVOLUTION OF LANGUAGE POLICY IN U.S. CONGRESSIONAL BILLS, 1989-2010. Revista Canaria de Estudios Ingleses. 71 (dic. 2015), 103–118.