@book { GlenInspiredHizmetinEurope,
    title = "Gülen-Inspired Hizmet in Europe",
    author = "Gürkan {Çelik} and Johan {Leman} and Karel {Steenbrink}",
    year = "2015",
    publisher = "Peter Lang Verlag",
    address = "Bruxelles, Belgium",
    doi = "10.3726/978-3-0352-6546-0",
    url = "https://www.peterlang.com/document/1053926"
}