@book { JngereEntwicklungdesTourismusinSdafrika,
    title = "Jüngere Entwicklung des Tourismus in Südafrika",
    author = "Achim {Kittelmann}",
    year = "1999",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832412579",
    url = "https://m.diplom.de/document/217171"
}