Lansing, C. (1998). Power & purity: Cathar heresy in Medieval Italy. Oxford University Press.
芝加哥风格引文Lansing, Carol. Power & Purity: Cathar Heresy in Medieval Italy. New York [u.a.]: Oxford University Press, 1998.
MLA引文Lansing, Carol. Power & Purity: Cathar Heresy in Medieval Italy. Oxford University Press, 1998.
警告：这些引文格式不一定是100％准确.