@book { DieProcurementBalancedScorecardalsInstrumentdesPersonalcontrollings,
    title = "Die Procurement Balanced Scorecard als Instrument des Personalcontrollings",
    author = "Alexander {Kropff}",
    year = "2009",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640384792",
    url = "https://www.hausarbeiten.de/document/132964"
}