Leff, G. (1969). History and social theory. University of Alabama Press.
芝加哥风格引文Leff, Gordon. History and Social Theory. University, Ala: University of Alabama Press, 1969.
MLA引文Leff, Gordon. History and Social Theory. University of Alabama Press, 1969.
警告：这些引文格式不一定是100％准确.