@unpublished{Breyer-Mayl{\"a}nder2013,
  author    = {Breyer-Mayl{\"a}nder, Thomas},
  title     = {Medien, Medienwirtschaft},
  series    = {Grundlagen der praktischen Information und Dokumentation},
  editor    = {Kuhlen, Rainer and Strauch, Dietmar and Semar, Wolfgang},
  edition   = {6},
  isbn      = {978-3-11-220398-9},
  url       = {http://www.degruyter.com/viewbooktoc/product/174371},
  institution = {Fakult{\"a}t Medien und Informationswesen (M+I) (bis 21.04.2021)},
  pages     = {634 (D13) -- 647},
  year      = {2013},
  subject      = {Information},
  language  = {de}
}