@book { GlobalandRegionalPowers,
    title = "Global and Regional Powers",
    subtitle = "Relations, Problems and Issues in the 21st Century",
    author = "Fulya {Köksoy}",
    year = "2020",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b16239",
    url = "https://www.peterlang.com/document/1111155"
}