"Consulta 104-2012 J*"(PDF). Departamento de Servicios Técnicos de la Asamblea Legislativa de Costa Rica (in Spanish). Archived from the original(PDF) on 16 December 2023.
Martin Bell's 1997 election was the first election of an Independent in the UK since 1951: "Martin Bell Profile". London: Guardian. 3 June 2008. Archived from the original on 17 October 2015. Retrieved 18 October 2012.
"Consulta 104-2012 J*"(PDF). Departamento de Servicios Técnicos de la Asamblea Legislativa de Costa Rica (in Spanish). Archived from the original(PDF) on 16 December 2023.
Martin Bell's 1997 election was the first election of an Independent in the UK since 1951: "Martin Bell Profile". London: Guardian. 3 June 2008. Archived from the original on 17 October 2015. Retrieved 18 October 2012.