@misc{MeierMetteHolzendorf2018,
  author    = {Meier, Bernd and Mette, Dieter and Holzendorf, Ulf},
  title     = {Startklar! - Sekundarstufe I},
  editor    = {Holzendorf, Ulf},
  edition   = {differenzierende Ausgabe, 1. Auflage, 2. Druck},
  publisher = {Oldenburg-Schulbuchverlag},
  address   = {M{\"u}nchen},
  isbn      = {978-3-637-02245-4},
  pages     = {184},
  year      = {2018},
  language  = {de}
}
@misc{Mueller2019,
  author    = {M{\"u}ller, Hans-Georg},
  title     = {Rechtschreibung},
  publisher = {Senatsverwaltung f{\"u}r Bildung, Jugend und Familie},
  address   = {Berlin},
  pages     = {18},
  year      = {2019},
  language  = {de}
}