@book { DieProfessionalisierungdesLehrerberufs,
    title = "Die Professionalisierung des Lehrerberufs",
    author = "Lina {Sayavong}",
    year = "2010",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640537235",
    url = "https://www.hausarbeiten.de/document/142652"
}