@book { WertewandelinderArbeitsweltundLeistungsmotivation,
    title = "Wertewandel in der Arbeitswelt und Leistungsmotivation",
    author = "Doreen  {Becker}",
    year = "2012",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656112211",
    url = "https://www.hausarbeiten.de/document/187709"
}