@book { ITbasierteKennzahlenanalyseimProvisionsexkasso,
    title = "IT-basierteKennzahlenanalyseimProvisionsexkasso",
    author = "Angelina {Jung}",
    year = "2011",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783842822450",
    url = "https://m.diplom.de/document/228686"
}