@book { PdagogischeFhrung,
    title = "Pädagogische Führung",
    author = "Meike {Zellner}",
    year = "2015",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-05584-9",
    url = "https://www.peterlang.com/document/1049353"
}