@book { AusbildungsabbruchundBiographie,
    title = "Ausbildungsabbruch und Biographie",
    author = "Sebastian {Klaus}",
    year = "2014",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-04528-4",
    url = "https://www.peterlang.com/document/1048604"
}