@book { ProfessionalittundProfessionalisierung,
    title = "Professionalität und Professionalisierung",
    author = "Ilse {Schrittesser}",
    year = "2009",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1104734"
}