Sedgwick, Carolyn W. (4 March 2020). Billerman, Shawn M.; Keeney, Brooke K.; Rodewald, Paul G.; Schulenberg, Thomas S. (eds.). "Toco Toucan (Ramphastos toco)". Birds of the World. Cornell Lab of Ornithology. doi:10.2173/bow.toctou1.01. Archived from the original on 4 October 2023. Retrieved 29 September 2023.
Sedgwick, Carolyn W. (4 March 2020). Billerman, Shawn M.; Keeney, Brooke K.; Rodewald, Paul G.; Schulenberg, Thomas S. (eds.). "Toco Toucan (Ramphastos toco)". Birds of the World. Cornell Lab of Ornithology. doi:10.2173/bow.toctou1.01. Archived from the original on 4 October 2023. Retrieved 29 September 2023.
Sedgwick, Carolyn W. (4 March 2020). Billerman, Shawn M.; Keeney, Brooke K.; Rodewald, Paul G.; Schulenberg, Thomas S. (eds.). "Toco Toucan (Ramphastos toco)". Birds of the World. Cornell Lab of Ornithology. doi:10.2173/bow.toctou1.01. Archived from the original on 4 October 2023. Retrieved 29 September 2023.
Haffer, Jürgen (1974). Avian speciation in tropical South America, with a systematic survey of the toucans (Ramphastidae) and jacamars (Galbulidae). Publications of the Nuttall Ornithological Club. Cambridge. ISBN9781877973246. OCLC1218148.{{cite book}}: CS1 maint: location missing publisher (link)