Cita APA (7th ed.)
Cummings, M. C. (1971). Democracy under pressure: An introduction to the American political system (2nd.ed.). Harcourt Brace Jovanovich.
Cita Chicago (17th ed.)
Cummings, Milton C. Democracy Under Pressure: An Introduction to the American Political System. 2nd.ed. New York: Harcourt Brace Jovanovich, 1971.
Cita MLA (9th ed.)
Cummings, Milton C. Democracy Under Pressure: An Introduction to the American Political System. 2nd.ed. Harcourt Brace Jovanovich, 1971.
Atenció: Aquestes cites poden no estar 100% correctes.