Frost, Darrel R. (2019). "Vitreorana helenae (Ayarzagüena, 1992)". Amphibian Species of the World: an Online Reference. Version 6.0. American Museum of Natural History. 11 Mart 2016 tarihinde kaynağından arşivlendi.
Frost, Darrel R. (2019). "Vitreorana helenae (Ayarzagüena, 1992)". Amphibian Species of the World: an Online Reference. Version 6.0. American Museum of Natural History. 11 Mart 2016 tarihinde kaynağından arşivlendi.