@book { DieAutomobilKaufentscheidung,
    title = "Die Automobil-Kaufentscheidung",
    author = "Mark {Unger}",
    year = "2018",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b13586",
    url = "https://www.peterlang.com/document/1068191"
}