@book { CrushonObamaACaseStudyontheImpactofYouTubeVideosonPoliticalCampaigning,
    title = "Crush on Obama. A Case Study on the Impact of YouTube-Videos on Political Campaigning",
    author = "Anna {Poppen}",
    year = "2014",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    url = "https://www.hausarbeiten.de/document/274673"
}