@book { TheCharismaticLeader,
    title = "The Charismatic Leader",
    subtitle = "21 Fertigkeiten, um mit Menschen erfolgreich zusammenzuarbeiten",
    author = "John C. {Maxwell}",
    year = "2026",
    publisher = "C.H.Beck",
    address = ", Deutschland",
    url = "https://vahlen.openpublishing.com/document/1722982"
}