Haupt, S. (1998). Testing incentives for illegal employment: Implicit contracts vs trade union bargaining.
Chicago-Zitierstil (17. Ausg.)Haupt, Stefan. Testing Incentives for Illegal Employment: Implicit Contracts Vs Trade Union Bargaining. Hamburg, 1998.
MLA-Zitierstil (8. Ausg.)Haupt, Stefan. Testing Incentives for Illegal Employment: Implicit Contracts Vs Trade Union Bargaining. 1998.
警告：这些引文格式不一定是100％准确.