Voert, G. t. (2003). Gregorian: Veni creator spiritu / Georg ter Voert. C-Script.
Lua i Stíl Chicago (17ú heag.)Voert, Georg ter. Gregorian: Veni Creator Spiritu / Georg Ter Voert. Markgröningen: C-Script, 2003.
Lua MLA (8ú heag.)Voert, Georg ter. Gregorian: Veni Creator Spiritu / Georg Ter Voert. C-Script, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.