@book { FrsLebengelerntDieberufsbildendeWaldorfschule,
    title = "Fürs Leben gelernt - Die berufsbildende Waldorfschule",
    author = "Klaus Peter {Freitag} and Wilfried {Gabriel} and Jürgen {Peters}",
    year = "2020",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b17570",
    url = "https://www.peterlang.com/document/1111487"
}