Fitzenberger, B., & Kohn, K. (2008). Union Density and Varieties of Coverage: The Anatomy of Union Wage Effects in Germany.
Lua i Stíl Chicago (17ú heag.)Fitzenberger, Bernd, agus Karsten Kohn. Union Density and Varieties of Coverage: The Anatomy of Union Wage Effects in Germany. Düsseldorf, 2008.
Lua MLA (8ú heag.)Fitzenberger, Bernd, agus Karsten Kohn. Union Density and Varieties of Coverage: The Anatomy of Union Wage Effects in Germany. 2008.
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