@book { Wertschtzung,
    title = "Wertschätzung",
    author = "Stephan {Pfob} and Benjamin {Dageroth} and Janett {Triskiel} and Tanja {Hentschel} and Caroline {Schwarz}",
    year = "2020",
    publisher = "Vahlen",
    address = "München, Deutschland",
    url = "https://vahlen.openpublishing.com/document/1221362"
}