APA (7th ed.) Zitazioa

CUMMINGS, M. C., & David Wise [joint Author]. (1981). Democracy under pressure: An introduction to the American political system (4th ed.). Harcourt Brace Jovanovich.

Chicago Style (17th ed.) Zitazioa

CUMMINGS, Milton C., eta David Wise [joint Author]. Democracy Under Pressure: An Introduction to the American Political System. 4th ed. New York: Harcourt Brace Jovanovich, 1981.

MLA (9th ed.) Zitazioa

CUMMINGS, Milton C., eta David Wise [joint Author]. Democracy Under Pressure: An Introduction to the American Political System. 4th ed. Harcourt Brace Jovanovich, 1981.