@book { AnalyseundEntwicklungdesEBookMarktesimdeutschprachigenRaum,
    title = "Analyse und Entwicklung des E-Book-Marktes im deutschprachigen Raum",
    author = "Sara {Schneider}",
    year = "2010",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836641821",
    url = "https://m.diplom.de/document/227345"
}