Before revision: Referendums by country Since the end of the 18th century, hundreds of national referendums have been organised in the world; Bruno S. Frey et Claudia Frey Marti, Le bonheur.
After revision: By country Since the end of the 18th century, hundreds of national referendums have been organised in the world; Bruno S. Frey et Claudia Frey Marti, Le bonheur.