Abel, E. (2010). Signs of the times: The visual politics of Jim Crow. University of California Press.
芝加哥风格引文Abel, Elizabeth. Signs of the Times: The Visual Politics of Jim Crow. Berkeley: University of California Press, 2010.
MLA引文Abel, Elizabeth. Signs of the Times: The Visual Politics of Jim Crow. University of California Press, 2010.
警告：这些引文格式不一定是100％准确.