@book { WerbewirkungskontrollevonWerbesendungen,
    title = "Werbewirkungskontrolle von Werbesendungen",
    author = "Reinhilde {Pöppl}",
    year = "2002",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832459178",
    url = "https://m.diplom.de/document/221370"
}