@book { KonzeptionundImplementierungvonKampagnenmanagement,
    title = "Konzeption und Implementierung von Kampagnenmanagement",
    author = "Ismail {Celik}",
    year = "2006",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832494070",
    url = "https://m.diplom.de/document/224541"
}