Auk (American Ornithologists Union). American Ornithologists' Union.
Lua i Stíl Chicago (17ú heag.)Auk (American Ornithologists Union). American Ornithologists' Union.
Lua MLA (9ú heag.)Auk (American Ornithologists Union). American Ornithologists' Union.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.