Root, R. L. (1991). Working at writing: Columnists and critics composing. Southern Illinois University Press.
芝加哥风格引文Root, Robert L. Working at Writing: Columnists and Critics Composing. Carbondale, Ill.: Southern Illinois University Press, 1991.
MLA引文Root, Robert L. Working at Writing: Columnists and Critics Composing. Southern Illinois University Press, 1991.
警告：这些引文格式不一定是100％准确.