Não informado. (2018). Recent Literature: The American Ornithologists' Union. American Ornithologists' Union.
Lua i Stíl Chicago (17ú heag.)Não informado. Recent Literature: The American Ornithologists' Union. Washington: American Ornithologists' Union, 2018.
Lua MLA (8ú heag.)Não informado. Recent Literature: The American Ornithologists' Union. American Ornithologists' Union, 2018.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.