@book { Kindermarketing,
    title = "Kindermarketing",
    subtitle = "Analyse und rechtliche Empfehlungen",
    author = "Tobias {Effertz}",
    year = "2008",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1105292"
}