ebrary, Inc, & Newport, F. (2010). The Gallup Poll: Public opinion 2009. Rowman & Littlefield.
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芝加哥风格引文
ebrary, Inc, 与 Frank Newport. The Gallup Poll: Public Opinion 2009. Ladnham: Rowman & Littlefield, 2010.
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MLA引文
ebrary, Inc, 与 Frank Newport. The Gallup Poll: Public Opinion 2009. Rowman & Littlefield, 2010.
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警告：这些引文格式不一定是100％准确.