Braak, H. v., & Degens, J. (1999). Siegfried & Roy: A life of magic / [english translation: Julia Degens]. Zyx Music.
Lua i Stíl Chicago (17ú heag.)Braak, Heike van, agus Julia Degens. Siegfried & Roy: A Life of Magic / [english Translation: Julia Degens]. Merenberg: Zyx Music, 1999.
Lua MLA (8ú heag.)Braak, Heike van, agus Julia Degens. Siegfried & Roy: A Life of Magic / [english Translation: Julia Degens]. Zyx Music, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.