Hartley, W. H., & Vincent, W. S. (1970). American civics (3rd ed.). Harcourt brace jovanovich.
芝加哥风格引文Hartley, William H., 与 William S. Vincent. American Civics. 3rd ed. New York: Harcourt brace jovanovich, 1970.
MLA引文Hartley, William H., 与 William S. Vincent. American Civics. 3rd ed. Harcourt brace jovanovich, 1970.
警告：这些引文格式不一定是100％准确.