Williamson, M. A. 1. (1929). The social worker in a group. Harper.
芝加哥风格引文Williamson, Margaretta A. 1891. The Social Worker in a Group. New York: Harper, 1929.
MLA引文Williamson, Margaretta A. 1891. The Social Worker in a Group. Harper, 1929.
警告：这些引文格式不一定是100％准确.