O-Connor, R. J. The growth and development of birds. John Wiley and Sons.
Lua i Stíl Chicago (17ú heag.)O-Connor, Raymond J. The Growth and Development of Birds. John Wiley and Sons.
Lua MLA (8ú heag.)O-Connor, Raymond J. The Growth and Development of Birds. John Wiley and Sons.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.