@book { ZielgruppenmarketingimFremdenverkehrvonRegionen,
    title = "Zielgruppenmarketing im Fremdenverkehr von Regionen",
    author = "Simone {Frömbling}",
    year = "2018",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b13655",
    url = "https://www.peterlang.com/document/1068246"
}