Sanders 1998, p. 153. Sanders, Paula A. (1998). "The Fatimid State, 969–1171". In Petry, Carl F. (ed.). The Cambridge History of Egypt, Volume 1: Islamic Egypt, 640–1517. Cambridge: Cambridge University Press. pp. 151–174. ISBN0-521-47137-0.
Sanders 1998, pp. 153, 157. Sanders, Paula A. (1998). "The Fatimid State, 969–1171". In Petry, Carl F. (ed.). The Cambridge History of Egypt, Volume 1: Islamic Egypt, 640–1517. Cambridge: Cambridge University Press. pp. 151–174. ISBN0-521-47137-0.