@book { DieBourboneninSpanienEinberblick,
    title = "Die Bourbonen in Spanien - Ein Überblick",
    author = "Carolin {Kollwitz}",
    year = "2003",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638187909",
    url = "https://www.hausarbeiten.de/document/13036"
}