@book { VonBacklinkszusozialenSignalenWieSocialMediadasOnlineMarketingverndert,
    title = "Von Backlinks zu sozialen Signalen: Wie Social Media das Online-Marketing verändert",
    author = "Tilman {Hjuler}",
    year = "2015",
    publisher = "BACHELOR + MASTER PUBLISHING",
    address = "Hamburg, Deutschland",
    url = "https://m.bachelor-master-publishing.de/document/297363"
}