Foner, P. S. (1958). Mark Twain: Social critic. International Publishers.
芝加哥风格引文Foner, Philip S. Mark Twain: Social Critic. New York: International Publishers, 1958.
MLA引文Foner, Philip S. Mark Twain: Social Critic. International Publishers, 1958.
警告：这些引文格式不一定是100％准确.