Cummings, M. C. (1971). Democracy under pressure: An introduction to the American political system (2nd.ed.). Harcourt Brace Jovanovich.
Citace podle Chicago (17th ed.)Cummings, Milton C. Democracy Under Pressure: An Introduction to the American Political System. 2nd.ed. New York: Harcourt Brace Jovanovich, 1971.
Citace podle MLA (9th ed.)Cummings, Milton C. Democracy Under Pressure: An Introduction to the American Political System. 2nd.ed. Harcourt Brace Jovanovich, 1971.
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