@book { DieTrkeizwischenEuropaundAsien,
    title = " Die Türkei zwischen Europa und Asien",
    author = "Regina {Weber}",
    year = "2005",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640073146",
    url = "https://www.hausarbeiten.de/document/109131"
}