Simon, H. (1962). The study of birds made simple. Doubleday.
Lua i Stíl Chicago (17ú heag.)Simon, Hilda. The Study of Birds Made Simple. Garden City, N. Y: Doubleday, 1962.
Lua MLA (9ú heag.)Simon, Hilda. The Study of Birds Made Simple. Doubleday, 1962.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.