^Riofrío-Lazo; et al. "The Ecological Role of the Vaquita, Phocoena sinus, in the Ecosystem of the Northern Gulf of California". Ecosystems. 15 (416–433): 3. {{cite journal}}: |access-date= requires |url= (help); Explicit use of et al. in: |last1= (help)
^Mckinley, James C., Jr. (2007). "Vaquita Porpoise, and a Way of Life, Face Extinction". The New York Times. {{cite journal}}: |access-date= requires |url= (help)CS1 maint: multiple names: authors list (link)
