1. California Natural Diversity Database (CNDDB). 2019. State and federally listed endangered and threatened animals of California. California Department of Fish and Wildlife. Available from: www.wildlife.ca.gov (Accessed 3 October 2019).
2. Dodd, C. K., Jr. 2013. Frogs of the United States and Canada, Volume 1. Johns Hopkins University Press, Baltimore, MD, USA.
3. Goldberg, S. R. 2019. Notes on reproduction of the foothill yellow-legged frog, Rana boylii (Anura: Ranidae), from California. Sonoran Herpetologist 32:43–45.
4. Goldberg, S. R. 2020. Notes on reproduction of Cascades frogs from California. California Fish and Wildlife 106:215–219.
5. Green, D. M., L. A. Weir, G. S. Casper, and M. J. Lannoo. 2013. North American Amphibians Distribution and Diversity. University of California Press, Berkeley, CA, USA.