Bardes, B. A., & Oldendick, R. W. (2000). Public opinion: Measuring the American mind. Wadsworth.
Lua i Stíl Chicago (17ú heag.)Bardes, Barbara A., agus Robert W. Oldendick. Public Opinion: Measuring the American Mind. Belmont, Calif: Wadsworth, 2000.
Lua MLA (9ú heag.)Bardes, Barbara A., agus Robert W. Oldendick. Public Opinion: Measuring the American Mind. Wadsworth, 2000.
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