Fairfield, Hannah; Wallace, Tim; Watkins, Derek (21 May 2015). „How ISIS Expands“. The New York Times. Suarchyvuota iš originalo 23 May 2015. Nuoroda tikrinta 15 September 2020.
Fairfield, Hannah; Wallace, Tim; Watkins, Derek (21 May 2015). „How ISIS Expands“. The New York Times. Suarchyvuota iš originalo 23 May 2015. Nuoroda tikrinta 15 September 2020.