@incollection{Teitscheid1990,
  author    = {Teitscheid, Petra},
  title     = {Kapitel 7.2. {\"O}ffentlichkeitsarbeit},
  series = {BJU Umweltschutzberater},
  booktitle = {BJU Umweltschutzberater},
  year      = {1990},
  language  = {mul}
}
@article{VeerTeitscheid2010,
  author    = {Veer, Barbara and Teitscheid, Petra},
  title     = {Wie nachhaltig sind Molkereien?},
  series = {DMZ - Deutsche Molkerei Zeitschrift},
  journal   = {DMZ - Deutsche Molkerei Zeitschrift},
  number    = {21 und 22},
  year      = {2010},
  language  = {mul}
}