Hallberg, R. v. (1990). Canons. Univ. of Chicago Press.
Lua i Stíl Chicago (17ú heag.)Hallberg, Robert von. Canons. Chicago ; London: Univ. of Chicago Press, 1990.
Lua MLA (8ú heag.)Hallberg, Robert von. Canons. Univ. of Chicago Press, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.