@book{EsserWolmerath2020,
  author    = {Esser, Axel and Wolmerath, Martin},
  title     = {Mobbing und psychische Gewalt},
  publisher = {Bund-Verlag},
  address   = {Frankfurt am Main},
  pages     = {317},
  year      = {2020},
  language  = {de}
}
@book{EsserWolmerath2015,
  author    = {Esser, Axel and Wolmerath, Martin},
  title     = {Mobbing und psychische Gewalt},
  publisher = {Bund-Verlag},
  address   = {Frankfurt am Main},
  isbn      = {978-3-7663-6330-5},
  pages     = {368},
  year      = {2015},
  language  = {de}
}