Davies, R. The frequency of existence: Bill Viola's archetypal sound / Rhys Davies. The art of Bill Viola.(2004).
Lua i Stíl Chicago (17ú heag.)Davies, Rhys. "The Frequency of Existence: Bill Viola's Archetypal Sound / Rhys Davies." The Art of Bill Viola.(2004) .
Lua MLA (8ú heag.)Davies, Rhys. "The Frequency of Existence: Bill Viola's Archetypal Sound / Rhys Davies." The Art of Bill Viola.(2004), .
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