@book { EinsatzmglichkeitendesInternetalsMarketingInstrument,
    title = "Einsatzmöglichkeiten des Internet als Marketing-Instrument",
    author = "Marko {Reimann}",
    year = "2006",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832494810",
    url = "https://m.diplom.de/document/224612"
}