@book { GemeinsamaufdemJakobsweg,
    title = "Gemeinsam auf dem Jakobsweg",
    subtitle = "Eine Familie pilgert nach Santiago",
    author = "Günter {Fandel}",
    year = "2007",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1102768"
}