@book { CelebrityEndorsementDieAuswirkungenvonSkandalenundFehltritten,
    title = "Celebrity Endorsement: Die Auswirkungen von Skandalen und Fehltritten",
    author = "Isabelle {Köhler}",
    year = "2015",
    publisher = "BACHELOR + MASTER PUBLISHING",
    address = "Hamburg, Deutschland",
    url = "https://m.bachelor-master-publishing.de/document/296756"
}