@book { InstrumentezurSteigerungderMitarbeitermotivation,
    title = "Instrumente zur Steigerung der Mitarbeitermotivation",
    author = "Sabrina {Post}",
    year = "2010",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836648097",
    url = "https://m.diplom.de/document/227843"
}