@misc{parti-socialiste-suisse,
  title   = {Parti socialiste suisse (PSS)},
  author  = {Togni, Carola},
  year    = {2014},
  month   = {jun},
  url     = {https://www.histoiredelasecuritesociale.ch/articles/les-institutions/histoire-de-la-securite-sociale-partis-politiques/parti-socialiste-suisse}
}