@book { InterkulturellesKonsumentenverhalten,
    title = "Interkulturelles Konsumentenverhalten",
    author = "Stefan {Müller} and Katja {Gelbrich}",
    year = "2021",
    publisher = "Vahlen",
    address = "München, Deutschland",
    url = "https://vahlen.openpublishing.com/document/1221357"
}