Gerstein - University of Toronto, The Philippine journal of science ... v. 1- 76, no. 1. Jan. 1906-1941, Manila, Bureau of printing, 1906-1941 (lire en ligne)
Taylor, 1922 : Additions to the herpetological fauna of the Philippine Islands, I. The Philippine journal of science, vol. 21, p. 161-206 (texte intégral).
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(en) Rafe M. Brown, Cameron D. Siler, Carl H. Oliveros et Luke J. Welton, The amphibians and reptiles of Luzon Island, Philippines, VIII: the herpetofauna of Cagayan and Isabela Provinces, northern Sierra Madre Mountain Range, PenSoft Publishers LTD, (ISBN978-954-642-669-7, lire en ligne)