Page, B. I., & Shapiro, R. Y. (1992). The rational public: Fifty years of trends in Americans' policy preferences. Univ. of Chicago.
Dyfyniad Arddull ChicagoPage, Benjamin I., and Robert Y. Shapiro. The Rational Public: Fifty Years of Trends in Americans' Policy Preferences. Chicago: Univ. of Chicago, 1992.
Dyfyniad MLAPage, Benjamin I., and Robert Y. Shapiro. The Rational Public: Fifty Years of Trends in Americans' Policy Preferences. Univ. of Chicago, 1992.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.