Kruuk, H. Otters. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Kruuk, H. Otters. Oxford University Press.
Lua MLA (8ú heag.)Kruuk, H. Otters. Oxford University Press.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.