Tullock, G. (2007). Open secrets of American foreign policy. World Scientific.
芝加哥风格引文Tullock, Gordon. Open Secrets of American Foreign Policy. Hackensack, N.J.: World Scientific, 2007.
MLA引文Tullock, Gordon. Open Secrets of American Foreign Policy. World Scientific, 2007.
警告：这些引文格式不一定是100％准确.