Ávalos, Ángela; Pardo V., Artoro (12 February 2012). "55% a favor de igualdad en derechos" (in Spanish). La Nación. Archived from the original on 4 June 2020. Retrieved 4 June 2020.
Murillo, Álvaro; Rodríguez, Frank (24 January 2018). "Shock religioso impacta apoyo a candidatos" [Religious shock impacts candidate support] (in Spanish). CIEP (UCR). Archived from the original on 26 January 2018. Retrieved 25 January 2018.
Murillo, Álvaro; Rodríguez, Frank (24 January 2018). "Shock religioso impacta apoyo a candidatos" [Religious shock impacts candidate support] (in Spanish). CIEP (UCR). Archived from the original on 26 January 2018. Retrieved 25 January 2018.
Ávalos, Ángela; Pardo V., Artoro (12 February 2012). "55% a favor de igualdad en derechos" (in Spanish). La Nación. Archived from the original on 4 June 2020. Retrieved 4 June 2020.