Vlak, K. (1999). Bye Bye Spiritual: Bye and Bye, Amazing Grace, O Happy Day, Amen / Luigi di Ghisallo. Rundel.
Chicago-Zitierstil (17. Ausg.)Vlak, Kees. Bye Bye Spiritual: Bye and Bye, Amazing Grace, O Happy Day, Amen / Luigi Di Ghisallo. Rot an der Rot: Rundel, 1999.
MLA-Zitierstil (8. Ausg.)Vlak, Kees. Bye Bye Spiritual: Bye and Bye, Amazing Grace, O Happy Day, Amen / Luigi Di Ghisallo. Rundel, 1999.
警告：这些引文格式不一定是100％准确.