Pat O'Brien. (2001). Target Science: Foundation Tier. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Pat O'Brien. Target Science: Foundation Tier. Oxford University Press, 2001.
Lua MLA (9ú heag.)Pat O'Brien. Target Science: Foundation Tier. Oxford University Press, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.