@book { MarcaLanzarote,
    title = "Marca Lanzarote",
    subtitle = "Ansätze des Nachhaltigen Tourismus in Spanien am Beispiel Lanzarote",
    author = "Susanne {Will}",
    year = "2000",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832426002",
    url = "https://m.diplom.de/document/218387"
}