@book { GlobalSourcingChancenRisikenundAnforderungen,
    title = "Global Sourcing. Chancen, Risiken und Anforderungen",
    author = "Frank {Graf}",
    year = "2014",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    url = "https://www.hausarbeiten.de/document/278976"
}