@book { DieKraftderVernderung,
    title = "Die Kraft der Veränderung",
    subtitle = "Lebenskrisen als Chance erkennen",
    author = "Hans {Kreis}",
    year = "2012",
    publisher = "dotbooks Verlag",
    address = "München, Deutschland",
    doi = "10.3239/9783955200268",
    url = "https://www.dotbooks.de/document/201868"
}