Sherrill, R., & Barber, J. D. (1974). Why they call it politics: A guide to America's government (Second edition.). Harcourt Brace Jovanovich.
Citace podle Chicago (17th ed.)Sherrill, Robert, a James David Barber. Why They Call It Politics: A Guide to America's Government. Second edition. New York: Harcourt Brace Jovanovich, 1974.
Citace podle MLA (9th ed.)Sherrill, Robert, a James David Barber. Why They Call It Politics: A Guide to America's Government. Second edition. Harcourt Brace Jovanovich, 1974.
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