Vlak, K. (1999). Bye Bye Spiritual: Bye and Bye, Amazing Grace, O Happy Day, Amen / Luigi di Ghisallo. Rundel.
Lua i Stíl Chicago (17ú heag.)Vlak, Kees. Bye Bye Spiritual: Bye and Bye, Amazing Grace, O Happy Day, Amen / Luigi Di Ghisallo. Rot an der Rot: Rundel, 1999.
Lua MLA (8ú heag.)Vlak, Kees. Bye Bye Spiritual: Bye and Bye, Amazing Grace, O Happy Day, Amen / Luigi Di Ghisallo. Rundel, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.