Gordon, R.G., Jr. (2005). Ethnologue: Languages of the World, 15th edition. (Dallas, TX: SIL International). Online version "Ethnologue: Languages of the World". Archived from the original on 7 November 2016. Retrieved 12 November 2009.
Shahnameh/Book of Kings by Abu'L Ferdawsi, edited by Jalal Khaleghi-Motlagh "ریرا". Archived from the original on 3 April 2014. Retrieved 20 August 2008.
Gordon, R.G., Jr. (2005). Ethnologue: Languages of the World, 15th edition. (Dallas, TX: SIL International). Online version "Ethnologue: Languages of the World". Archived from the original on 7 November 2016. Retrieved 12 November 2009.
Shahnameh/Book of Kings by Abu'L Ferdawsi, edited by Jalal Khaleghi-Motlagh "ریرا". Archived from the original on 3 April 2014. Retrieved 20 August 2008.