Keen, F. N. (1934). A better League of nations. G. Allen & Unwin ltd.
芝加哥风格引文Keen, Frank Noel. A Better League of Nations. London: G. Allen & Unwin ltd, 1934.
MLA引文Keen, Frank Noel. A Better League of Nations. G. Allen & Unwin ltd, 1934.
警告：这些引文格式不一定是100％准确.