@book { AgePower2010ErfolgreichesBestAgerMarketing,
    title = "Age Power 2010 - Erfolgreiches Best Ager-Marketing",
    author = "Tobias {Giereth}",
    year = "2005",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832487249",
    url = "https://m.diplom.de/document/223872"
}