Go Visit Costa Rica: Arenal Volcano & Northern Lowlands – Costa Rica – Go Visit Costa Rica, Retrieved 13 May 2014 visitcostarica.com: Costa Rica Tourism Official Website.
Accesat în 13 mai 2014. Mentenanță CS1: Formatul datelor (link) ^ Go Visit Costa Rica: Arenal Volcano & Northern Lowlands - Costa Rica - Go Visit Costa Rica, Retrieved 13 May 2014 ^ visitcostarica.com: Costa Rica Tourism Official Website.