Riche, P. (1978). Daily life in the world of Charlemagne. University of Pennsylvania.
芝加哥风格引文Riche, Pierre. Daily Life in the World of Charlemagne. Pennsylvania: University of Pennsylvania, 1978.
MLA引文Riche, Pierre. Daily Life in the World of Charlemagne. University of Pennsylvania, 1978.
警告：这些引文格式不一定是100％准确.