Facts & Information / VolcanoDiscovery: Platanar Volcano, Costa Rica – facts & information / VolcanoDiscovery:, Retrieved 15 May 2014 "Visita al Cerro Espíritu Santo en Concepción de Naranjo, Alajuela".
Accesat în 15 mai 2014.  ^ Facts & Information / VolcanoDiscovery: Platanar Volcano, Costa Rica - facts & information / VolcanoDiscovery:, Retrieved 15 May 2014 ^ „Visita al Cerro Espíritu Santo en Concepción de Naranjo, Alajuela”.