@book { DieProgrammatikderCDU,
    title = "Die Programmatik der CDU",
    author = "Patrick {Buck}",
    year = "2013",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656417934",
    url = "https://www.hausarbeiten.de/document/213621"
}