@book { DieKraftderLearningCircles,
    title = "Die Kraft der Learning Circles",
    subtitle = "Umsetzung, Wirkung und Einsatzmöglichkeiten",
    author = "Nele {Graf} and Ursula {Liebhart} and Antje {Holst} and Franziska {Richter} and Thomas {Tillmann} and Lina {Hastedt}",
    year = "2025",
    publisher = "Vahlen",
    address = "München, Deutschland",
    url = "https://vahlen.openpublishing.com/document/1582194"
}