Hurd, G. (1973). Human societies: An introduction to sociology. Routledge and Kegan Paul.
芝加哥风格引文Hurd, Geoffrey. Human Societies: An Introduction to Sociology. London, Boston: Routledge and Kegan Paul, 1973.
MLA引文Hurd, Geoffrey. Human Societies: An Introduction to Sociology. Routledge and Kegan Paul, 1973.
警告：这些引文格式不一定是100％准确.