Cartwright, F. C. (1937). G-men of the G. P. O.: The story of the G. P. O.'s fight against crime. S. Low, Marston.
芝加哥风格引文Cartwright, Frederick Charles. G-men of the G. P. O.: The Story of the G. P. O.'s Fight Against Crime. London: S. Low, Marston, 1937.
MLA引文Cartwright, Frederick Charles. G-men of the G. P. O.: The Story of the G. P. O.'s Fight Against Crime. S. Low, Marston, 1937.
警告：这些引文格式不一定是100％准确.