Downing. The Chain of Things. Cornell University Press.
Lua i Stíl Chicago (17ú heag.)Downing. The Chain of Things. Cornell University Press.
Lua MLA (9ú heag.)Downing. The Chain of Things. Cornell University Press.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.