Southern, R. W. (1970). Western society and the Church in the Middle Ages. Penguin Books.
芝加哥风格引文Southern, R. W. Western Society and the Church in the Middle Ages. Harmondsworth, Eng.: Penguin Books, 1970.
MLA引文Southern, R. W. Western Society and the Church in the Middle Ages. Penguin Books, 1970.
警告：这些引文格式不一定是100％准确.