@book { LightroomClassicundCC,
    title = "Lightroom Classic und CC",
    author = "Martin {Quedenbaum}",
    year = "2020",
    publisher = "Schlütersche Verlagsgesellschaft mbH & Co. KG",
    address = ", Deutschland",
    url = "https://schluetersche.openpublishing.com/document/932686"
}