1. Afro Barometer 6. Available at:
http://afrobarometer.org/data/merged-round-6-data-36-countries-2016
.
2. Arab Barometer II. Available at:
http://www.arabbarometer.org/waves/arab-barometer-wave-ii/
.
3. Arab Barometer IV. Available at:
http://www.arabbarometer.org/waves/arab-barometer-wave-iv/
.
4. Arab Transformations. Available at:
https://www.researchgate.net/profile/Pamela_Abbott3/publications
.
5. Gallup World Poll. Information available at:
https://www.gallup.com/analytics/213617/gallup-analytics.aspx
.