Wright, H. (1967). Biology. New York University Press.
Lua i Stíl Chicago (17ú heag.)Wright, Helen. Biology. New York: New York University Press, 1967.
Lua MLA (9ú heag.)Wright, Helen. Biology. New York University Press, 1967.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.