Nickell, S. (1979). Education and Lifetime Patterns of Unemployment.
芝加哥风格引文Nickell, S. Education and Lifetime Patterns of Unemployment. 1979.
MLA引文Nickell, S. Education and Lifetime Patterns of Unemployment. 1979.
警告：这些引文格式不一定是100％准确.
APA引文