Fretwell, D. (1993). Developing effective employment services. World Bank.
芝加哥风格引文Fretwell, David. Developing Effective Employment Services. Washington, D.C: World Bank, 1993.
MLA引文Fretwell, David. Developing Effective Employment Services. World Bank, 1993.
警告：这些引文格式不一定是100％准确.