2 literature references for Craugastor augusti (Cope, 1880):

Author: Frost, Darrel R.
Year: 2009
Source: database. Amphibian Species of the World: an Online Reference v5.3
Author: Crother, Brian I., Jeff Boundy, Frank T. Burbrink, et al. / Moriarty, John J., ed.
Year: 2008
Title: Scientific and Standard English Names of Amphibians and Reptiles of North America North of Mexico, With Comments Regarding Confidence in Our Understanding, Sixth Ed.
Source: Herpetological Circular No. 37