@book { KundenbindungdurchCorporateCitizenship,
    title = "Kundenbindung durch Corporate Citizenship",
    author = "Anika {Pohl}",
    year = "2005",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832491079",
    url = "https://m.diplom.de/document/224265"
}