@book { VernderteAnforderungenandiePersonalberatungsbranche,
    title = "Veränderte Anforderungen an die Personalberatungsbranche",
    author = "Marlene {Öhlerking}",
    year = "2014",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/275337"
}