Croly, H. D. (1915). Progressive democracy. The Macmillan company.
芝加哥风格引文Croly, Herbert David. Progressive Democracy. New York: The Macmillan company, 1915.
MLA引文Croly, Herbert David. Progressive Democracy. The Macmillan company, 1915.
警告：这些引文格式不一定是100％准确.