↑Nordhoff, Sebastian; Hammarström, Harald; Forkel, Robert; Haspelmath, Martin, eds. (2013). "بیهاری". Glottolog 2.2. Leipzig: Max Planck Institute for Evolutionary Anthropology.نگهداری یادکرد:نمایش-ویراستاران (link)
↑^ National Portal of India: Government: Constitution of India
↑ ۳٫۰۳٫۱Jain Dhanesh, mardona George, The Indo-Aryan Languages, pp500, "..the number of speakers of Bihari languages are difficult to indicate because of unreliable sources. In the urban region most educated speakers of the language name Hindi as their language because this is what they use in formal contexts and believe it to be the appropriate response because of lack of awareness. The uneducated and the urban population of the region return Hindi as the generic name for their language."