@book { ECommerceinMultikanalunternehmen,
    title = "E-Commerce in Multikanalunternehmen",
    author = "Karin {Armbruster Reif}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1099119"
}