@book { WerbekommunikationimWandel,
    title = "Werbekommunikation im Wandel",
    author = "Martin {Hahn} and Sabine {Ylönen}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1091371"
}