Cita APA

Cummings, M. C. (1993). Democracy under pressure: An introduction to the American political system (Seventh edition.). Harcourt Brace Jovanovich.

Citación estilo Chicago

Cummings, Milton C. Democracy Under Pressure: An Introduction to the American Political System. Seventh edition. Forth Worth, Tx: Harcourt Brace Jovanovich, 1993.

Cita MLA

Cummings, Milton C. Democracy Under Pressure: An Introduction to the American Political System. Seventh edition. Harcourt Brace Jovanovich, 1993.