Kultgen, J. H. (1988). Ethics and professionalism. University of Pennsylvania Press.
芝加哥风格引文Kultgen, John H. Ethics and Professionalism. Philadelphia: University of Pennsylvania Press, 1988.
MLA引文Kultgen, John H. Ethics and Professionalism. University of Pennsylvania Press, 1988.
警告：这些引文格式不一定是100％准确.