@book { LEADCOACH,
    title = "LEAD COACH",
    subtitle = "Warum gutes Führen Coaching braucht",
    author = "Angelika {Ehrhardt} and Daniela {Elsner}",
    year = "2026",
    publisher = "Vahlen",
    address = "München, Deutschland",
    url = "https://vahlen.openpublishing.com/document/1696391"
}