Darvall, F. O. (1939). The American political scene. T. Nelson and sons ltd.
芝加哥风格引文Darvall, Frank Ongley. The American Political Scene. London, New York [etc.]: T. Nelson and sons ltd, 1939.
MLA引文Darvall, Frank Ongley. The American Political Scene. T. Nelson and sons ltd, 1939.
警告：这些引文格式不一定是100％准确.