Echard, S. (2008). Printing the Middle Ages. PENN/University of Pennsylvania Press.
芝加哥风格引文Echard, Siân. Printing the Middle Ages. Philadelphia: PENN/University of Pennsylvania Press, 2008.
MLA引文Echard, Siân. Printing the Middle Ages. PENN/University of Pennsylvania Press, 2008.
警告：这些引文格式不一定是100％准确.