Willke, J. C. (1984). Slavery and abortion (ed.). Hayes Publishing company.
芝加哥风格引文Willke, J C. Slavery and Abortion. ed. Cincinnati: Hayes Publishing company, 1984.
MLA引文Willke, J C. Slavery and Abortion. ed. Hayes Publishing company, 1984.
警告：这些引文格式不一定是100％准确.