Which non-EU microstate is a neighbour of the country which held an immigration referendum in February 2014?
Swiss immigration referendum, February 2014: The Swiss federal popular initiative "against mass immigration" (German: "Eidgenössische Volksinitiative "Gegen Masseneinwanderung"" , French: "Initiative populaire « Contre l'immigration de masse »" , Italian: "Iniziativa popolare "Contro l'immigrazione di massa"" ) was a referendum that aimed to limit immigration through quotas, as it had been prior to the bilateral treaties between Switzerland and the European Union launched 2002. Switzerland–European Union relations:  All but one (the microstate Liechtenstein) of Switzerland's neighbouring countries are EU member states.
Liechtenstein