@book { UnitedStatesforeignpolicyandthefightagainstterrorisminAfghanistan,
    title = "United States foreign policy and the fight against terrorism in Afghanistan",
    author = "Michael {Wünsch}",
    year = "2012",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656139690",
    url = "https://www.hausarbeiten.de/document/189649"
}