F., Clements, James (2007). The Clements checklist of birds of the world. Clements, James F., Cornell University. Laboratory of Ornithology., American Birding Association. (6th ed.). Ithaca: Comstock Pub. Associates/Cornell University Press. ISBN9780801445019. OCLC77573859.{{cite book}}: CS1 maint: multiple names: authors list (link)