@book { BeruflichesSchreiben,
    title = "Berufliches Schreiben",
    author = "Eva-Maria {Jakobs} and Katrin {Lehnen}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1105199"
}