@misc{trade-unions,
  title   = {Trade Unions},
  author  = {Togni, Carola and Stüdli, Beat and Canonica, Alan},
  year    = {2017},
  month   = {jun},
  url     = {https://www.historyofsocialsecurity.ch/articles/institutions/specialist-and-stakeholder-organisations/trade-unions}
}