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.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)Coppin, Clayton A., ба 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 -ийн эшлэл (9 дэх хэвлэлт)Coppin, Clayton A., ба Jack C. High. The Politics of Purity: Harvey Washington Wiley and the Origins of Federal Food Policy. Univeristy of Michigan Press, 1999.
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