@book { DieKausalanalysealsInstrumentderMarktforschung, title = "Die Kausalanalyse als Instrument der Marktforschung", author = "Martin {Seibt}", year = "2001", publisher = "Diplom.de", address = "Hamburg, Deutschland", doi = "10.3239/9783832433932", url = "https://m.diplom.de/document/219068" }