Cita APA (7th ed.)
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.
Cita Chicago (17th ed.)
Coppin, Clayton A., i Jack C. High. The Politics of Purity: Harvey Washington Wiley and the Origins of Federal Food Policy. Ann Arbor: Univeristy of Michigan Press, 1999.
Cita MLA (9th ed.)
Coppin, Clayton A., i Jack C. High. The Politics of Purity: Harvey Washington Wiley and the Origins of Federal Food Policy. Univeristy of Michigan Press, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.