Brian Spooner (1994)۔ "Dari, Farsi, and Tojiki"۔ $1 میں Mehdi Marashi۔ Persian Studies in North America: Studies in Honor of Mohammad Ali Jazayery۔ Leiden: Brill۔ صفحہ: 177–178
Brian Spooner (2012)۔ "Dari, Farsi, and Tojiki"۔ $1 میں Harold Schiffman۔ Language policy and language conflict in Afghanistan and its neighbors: the changing politics of language choice۔ Leiden: Brill۔ صفحہ: 94
George L. Campbell، Gareth King، مدیران (2013)۔ "Persian"۔ Compendium of the World's Languages (3rd ایڈیشن)۔ Routledge۔ صفحہ: 1339
