@book {9783864967344, title = "Kundengewinnung online", isbn = "9783864967344", edition = "1", url = "http://www.content-select.com/index.php?id=bib_view&ean=9783864967344", url = "https://content-select.com/de/portal/media/view/55102369-3a84-4cb1-8e63-0f44b0dd2d03", publisher = "UVK Verlagsgesellschaft", }