Willim, H. (1987). Trade unions and occupational safety in the German Democratic Republic. International Labour Organization.
Chicago-Zitierstil (17. Ausg.)Willim, Horst. Trade Unions and Occupational Safety in the German Democratic Republic. International Labour Organization, 1987.
MLA-Zitierstil (9. Ausg.)Willim, Horst. Trade Unions and Occupational Safety in the German Democratic Republic. International Labour Organization, 1987.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.