European Trade Union Institute (ETUI). (1992). Environmental protection in Europe: Situation and trade union views. Brussels: ETUI.
Lua i Stíl Chicago (17ú heag.)European Trade Union Institute (ETUI). Environmental Protection in Europe: Situation and Trade Union Views. Brussels: ETUI, 1992.
Lua MLA (8ú heag.)European Trade Union Institute (ETUI). Environmental Protection in Europe: Situation and Trade Union Views. Brussels: ETUI, 1992.
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