Riestra, Miguel A. «ERWIN H. EPSTEIN, Politics and Education in Puerto Rico. A Documentary Survey of the Language Issue, Tbe Scarecrow Press, Inc., Metuchen, N.]., 1970». Revista De Ciencias Sociales, n.º 3, enero de 1971, pp. 409-11, https://revistas.upr.edu/index.php/rcs/article/view/9026.