↑ 1.01.11.2Samadi, Habibeh; Nick Perkins (2012). Martin Ball; David Crystal; Paul Fletcher (บ.ก.). Assessing Grammar: The Languages of Lars. Multilingual Matters. p. 169. ISBN978-1-84769-637-3.
↑"IRAQ". Encyclopædia Iranica. สืบค้นเมื่อ 7 November 2014.
↑"Persian | Department of Asian Studies" (ภาษาอังกฤษแบบอเมริกัน). สืบค้นเมื่อ 2 January 2019. There are numerous reasons to study Persian: for one thing, Persian is an important language of the Middle East and Central Asia, spoken by approximately 70 million native speakers and roughly 110 million people worldwide.
↑ 5.05.1Constitution of the Islamic Republic of Iran: Chapter II, Article 15: "The official language and script of Iran, the lingua franca of its people, is Persian. Official documents, correspondence, and texts, as well as text-books, must be in this language and script. However, the use of regional and tribal languages in the press and mass media, as well as for teaching of their literature in schools, is allowed in addition to Persian."
↑"What Languages are Spoken in Afghanistan?". 2004. สืบค้นเมื่อ June 13, 2012. Pashto and Dari are the official languages of the state. are – in addition to Pashto and Dari – the third official language in areas where the majority speaks them