Não informado. (1978). Studies in avian biology. Cooper Ornithological Society.
Lua i Stíl Chicago (17ú heag.)Não informado. Studies in Avian Biology. Lawrence, Kan: Cooper Ornithological Society, 1978.
Lua MLA (8ú heag.)Não informado. Studies in Avian Biology. Cooper Ornithological Society, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.