@book { NutzenpotenzialvonSocialMedia,
    title = "Nutzenpotenzial von Social Media",
    author = "Martin {Kost}",
    year = "2013",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656378082",
    url = "https://www.hausarbeiten.de/document/210009"
}