Crebbin, J., & Hellard, S. (2004). Apples. Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Crebbin, June, agus Susan Hellard. Apples. Cambridge: Cambridge University Press, 2004.
Lua MLA (8ú heag.)Crebbin, June, agus Susan Hellard. Apples. Cambridge University Press, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.