Klein, M., & Harford, T. (2005). The market for aid. International Finance Corporation.
芝加哥风格引文Klein, Michael, 与 Tim Harford. The Market for Aid. Washington, D.C.: International Finance Corporation, 2005.
MLA引文Klein, Michael, 与 Tim Harford. The Market for Aid. International Finance Corporation, 2005.
警告：这些引文格式不一定是100％准确.