@book { Klarheit,
    title = "Klarheit",
    subtitle = "Impulse für mehr Stabilität & Selbstvertrauen mit der C.O.L.D.-Water®-Methode",
    author = "Mirjam {Berle}",
    year = "2026",
    publisher = "C.H.Beck",
    address = ", Deutschland",
    url = "https://vahlen.openpublishing.com/document/1730831"
}