@book { MarkenpolitikalsErfolgsfaktor,
    title = "Markenpolitik als Erfolgsfaktor",
    author = "Carsten {Ackermann}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1098132"
}