"National Voter Survey in Egypt"(PDF). Al-Ahram Centre for Political and Strategic Studies (ACPSS). 22 August 2011. Archived(PDF) from the original on 25 April 2012. Retrieved 7 September 2011.
Charney Research (20 March 2011). "EGYPT NATIONAL SURVEY"(PDF). International Peace Institute Poll. Archived(PDF) from the original on 4 March 2016. Retrieved 7 September 2011.
Charney Research (20 March 2011). "EGYPT NATIONAL SURVEY"(PDF). International Peace Institute Poll. Archived(PDF) from the original on 4 March 2016. Retrieved 7 September 2011.
"National Voter Survey in Egypt"(PDF). Al-Ahram Centre for Political and Strategic Studies (ACPSS). 22 August 2011. Archived(PDF) from the original on 25 April 2012. Retrieved 7 September 2011.