@book { MultimediaMarketing,
    title = "Multimedia Marketing",
    author = "Thomas {Urban}",
    year = "2012",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-00705-3",
    url = "https://www.peterlang.com/document/1044455"
}