@misc{Haas2012,
  author    = {Stefan Haas},
  title     = {Theoriemodelle der Zeitgeschichte (Version 2.0)},
  edition   = {Version 2.0},
  doi       = {10.14765/zzf.dok.2.788.v2},
  url       = {http://docupedia.de/zg/haas_theoriemodelle_v2_de_2012},
  type      = {webpublication},
  year        = {2012},
}