Weiner, J. (1995). The beak of the finch: A story of evolution in our time. Knopf.
Lua i Stíl Chicago (17ú heag.)Weiner, Jonathan. The Beak of the Finch: A Story of Evolution in Our Time. New York: Knopf, 1995.
Lua MLA (9ú heag.)Weiner, Jonathan. The Beak of the Finch: A Story of Evolution in Our Time. Knopf, 1995.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.