@book { GrundlagenderinternationalenWirtschaftspolitik,
    title = "Grundlagen der internationalen Wirtschaftspolitik",
    subtitle = "Internationale Handelspolitik",
    author = "Helga {Luckenbach}",
    year = "2011",
    publisher = "Vahlen",
    address = "München, Deutschland",
    url = "https://vahlen.openpublishing.com/document/1220869"
}