@book { DieTrueSaleInitiativeTSIPlneHintergrndeundPerspektiven,
    title = "Die True Sale Initiative (TSI) - Pläne, Hintergründe und Perspektiven",
    author = "David {Wehrhahn}",
    year = "2004",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638272438",
    url = "https://www.hausarbeiten.de/document/24349"
}