@book { AnstzezurVerbesserungderArbeitsmotivation,
    title = "Ansätze zur Verbesserung der Arbeitsmotivation",
    author = "Mirja {Neumann}",
    year = "2002",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640053995",
    url = "https://www.hausarbeiten.de/document/107124"
}