Caldwell, D. (2011). Vortex of conflict: U.S. policy toward Afghanistan, Pakistan, and Iraq. Stanford Security Studies.
芝加哥风格引文Caldwell, Dan. Vortex of Conflict: U.S. Policy Toward Afghanistan, Pakistan, and Iraq. Stanford, CA: Stanford Security Studies, 2011.
MLA引文Caldwell, Dan. Vortex of Conflict: U.S. Policy Toward Afghanistan, Pakistan, and Iraq. Stanford Security Studies, 2011.
警告：这些引文格式不一定是100％准确.