Engels, F. (1972). The origin of the family, private property, and the state. International Publishers.
芝加哥风格引文Engels, Frederick. The Origin of the Family, Private Property, and the State. New York: International Publishers, 1972.
MLA引文Engels, Frederick. The Origin of the Family, Private Property, and the State. International Publishers, 1972.
警告：这些引文格式不一定是100％准确.