Vlak, K. (1999). Bye Bye Spiritual: Bye and Bye, Amazing Grace, O Happy Day, Amen / Luigi di Ghisallo. Rundel.
Chicagoスタイル(17版)引用形式Vlak, Kees. Bye Bye Spiritual: Bye and Bye, Amazing Grace, O Happy Day, Amen / Luigi Di Ghisallo. Rot an der Rot: Rundel, 1999.
MLA(8版)引用形式Vlak, Kees. Bye Bye Spiritual: Bye and Bye, Amazing Grace, O Happy Day, Amen / Luigi Di Ghisallo. Rundel, 1999.
警告: この引用は必ずしも正確ではありません.