Beeby, A., & Brennan, A. (2004). First ecology (2nd ed.). Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Beeby, Alan, agus Anne-Maria Brennan. First Ecology. 2nd ed. Oxford: Oxford University Press, 2004.
Lua MLA (8ú heag.)Beeby, Alan, agus Anne-Maria Brennan. First Ecology. 2nd ed. Oxford University Press, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.