@book { NationalstaatodermultikulturelleGesellschaft,
    title = "Nationalstaat oder multikulturelle Gesellschaft?",
    author = "Peter {Bachmaier}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1095074"
}