Gaya APA

Cummings, M, C., Wise, D. (1981). Democracy Under Pressure : An Introduction the American Political System (Ed. 4). New York: Harcourt Brace Jovanovich.

Gaya MLA

Cummings, Milton, C.., Wise, David. "Democracy Under Pressure : An Introduction the American Political System". Ed. 4 New York: Harcourt Brace Jovanovich, 1981. Text.