Vlak, K. (1999). Bye Bye Spiritual: Bye and Bye, Amazing Grace, O Happy Day, Amen / Luigi di Ghisallo. Rundel.
Cita Chicago (17th ed.)Vlak, Kees. Bye Bye Spiritual: Bye and Bye, Amazing Grace, O Happy Day, Amen / Luigi Di Ghisallo. Rot an der Rot: Rundel, 1999.
Cita MLA (8th ed.)Vlak, Kees. Bye Bye Spiritual: Bye and Bye, Amazing Grace, O Happy Day, Amen / Luigi Di Ghisallo. Rundel, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.