@book { InvestitioninErneuerbareEnergieninderTrkei,
    title = "Investition in Erneuerbare Energien in der Türkei",
    author = "Alpay {Evcil}",
    year = "2008",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836620734",
    url = "https://m.diplom.de/document/226258"
}