@book { OnlineReTargetingimB2BMarketing,
    title = "Online (Re)-Targeting im B2B-Marketing",
    author = "Patrick {Stern}",
    year = "2012",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656122043",
    url = "https://www.hausarbeiten.de/document/188571"
}