@book { EntwicklungvonintegrierterMarketingkommunikation,
    title = "Entwicklung von integrierter Marketingkommunikation",
    subtitle = "Dargestellt am Planning von Full-Service Agenturen",
    author = "Ulrich {Korn}",
    year = "1999",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832414160",
    url = "https://m.diplom.de/document/217275"
}