Robertson, D. W. (1962). A preface to Chaucer: Studies in medieval perspectives. Princeton University Press.
芝加哥风格引文Robertson, D. W. A Preface to Chaucer: Studies in Medieval Perspectives. Princeton, N.J: Princeton University Press, 1962.
MLA引文Robertson, D. W. A Preface to Chaucer: Studies in Medieval Perspectives. Princeton University Press, 1962.
警告：这些引文格式不一定是100％准确.