(1997). Substance: Its nature and existence / Joshua Hoffman and Gary S. Rosenkrantz.
芝加哥风格引文Substance: Its Nature and Existence / Joshua Hoffman and Gary S. Rosenkrantz. 1997.
MLA引文Substance: Its Nature and Existence / Joshua Hoffman and Gary S. Rosenkrantz. 1997.
警告：这些引文格式不一定是100％准确.