Berrill, N. J. (1966). Biology in action: A beginning colllege textbook. Dodd, Mead.
Lua i Stíl Chicago (17ú heag.)Berrill, N. J. Biology in Action: A Beginning Colllege Textbook. New York: Dodd, Mead, 1966.
Lua MLA (9ú heag.)Berrill, N. J. Biology in Action: A Beginning Colllege Textbook. Dodd, Mead, 1966.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.