Freedman, R. (1952). Principles of sociology: A text readings. Holt.
芝加哥风格引文Freedman, Ronald. Principles of Sociology: A Text Readings. New York: Holt, 1952.
MLA引文Freedman, Ronald. Principles of Sociology: A Text Readings. Holt, 1952.
警告：这些引文格式不一定是100％准确.