Rugg, H. (1929). An introduction to American civilization: A study of economic life in the United States. Ginn and Company.
芝加哥风格引文Rugg, Harold. An Introduction to American Civilization: A Study of Economic Life in the United States. Boston: Ginn and Company, 1929.
MLA引文Rugg, Harold. An Introduction to American Civilization: A Study of Economic Life in the United States. Ginn and Company, 1929.
警告：这些引文格式不一定是100％准确.