"Al-Jallad. The earliest stages of Arabic and its linguistic classification (Routledge Handbook of Arabic Linguistics, forthcoming)". [2] Alirita la 24-an de marto 2017.
"Christianity 2015: Religious Diversity and Personal Contact" (PDF). gordonconwell.edu. Januaro 2015. [3]Arkivigite je 2017-05-25 per la retarkivo Wayback Machine Alirita la 24-an de marto 2017.
"Executive Summary". Future of the Global Muslim Population. Pew Research Center. [4] Alirita la 24-an de Marto 2017.
"Table: Muslim Population by Country | Pew Research Center's Religion & Public Life Project". Features.pewforum.org. 2011-01-27. [5] Alirita la 24-an de marto 2017.
un.org
"UN official languages". Un.org. [6] Alirita la 24-an de marto 2017.
unesco.org
"World Arabic Language Day". UNESCO. 18-a de decembro 2014. [1] Alirita la 24-an de marto 2017.
web.archive.org
"Christianity 2015: Religious Diversity and Personal Contact" (PDF). gordonconwell.edu. Januaro 2015. [3]Arkivigite je 2017-05-25 per la retarkivo Wayback Machine Alirita la 24-an de marto 2017.