1. Leonor Cabrera, and William Ancker, 1997, English language education in Costa Rica [html] . TESOL. Retrieved January 22, 2002, from: http://www.tesol.org/isaffil/affil/profiles/costarica.html.
2. Estadistica, Departamento de, 1997Serie Historica del Numero de Instituciones en la Educacion General Basica Periodo: 1979-1997[Historical series of the number of schools in the general education system period: 1979-1997](Database). Ministerio de Educacion Publica. Retrieved March 6, 2002, from: http://www.kiosco.cenadi.mep.go.cr/estadistica.