@book { DieVerantwortungdesMarketingfrBezugsgruppen,
    title = "Die Verantwortung des Marketing für Bezugsgruppen",
    author = "Nadja {Maisenbacher}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1103236"
}