Jasper, D. Screening angels: "The Messenger", Durham Cathedral, 1996 / David Jasper. The art of Bill Viola.(2004).
Lua i Stíl Chicago (17ú heag.)Jasper, David. "Screening Angels: "The Messenger", Durham Cathedral, 1996 / David Jasper." The Art of Bill Viola.(2004) .
Lua MLA (8ú heag.)Jasper, David. "Screening Angels: "The Messenger", Durham Cathedral, 1996 / David Jasper." The Art of Bill Viola.(2004), .
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.