Coppin, C. A., & High, J. C. (1999). The politics of purity: Harvey Washington Wiley and the origins of Federal food policy. Univeristy of Michigan Press.
芝加哥风格引文Coppin, Clayton A., 与 Jack C. High. The Politics of Purity: Harvey Washington Wiley and the Origins of Federal Food Policy. Ann Arbor: Univeristy of Michigan Press, 1999.
MLA引文Coppin, Clayton A., 与 Jack C. High. The Politics of Purity: Harvey Washington Wiley and the Origins of Federal Food Policy. Univeristy of Michigan Press, 1999.
警告：这些引文格式不一定是100％准确.