Tham khảo Chữ_Gupta

  1. ↑ Gazetteer of the Bombay Presidency, tr. 30, tại Google Books, Rudradaman’s inscription from 1st through 4th century CE found in Gujarat, India, Stanford University Archives, pages 30–45
  2. ↑ Sharma, Ram. 'Brahmi Script' . Delhi: BR Publishing Corp, 2002
  3. ↑ Srivastava, Anupama. 'The Development of Imperial Gupta Brahmi Script' . New Delhi: Ramanand, 1998
  4. ↑ Fischer, Steven Roger. 'A History of Writing' . UK: Reaktion, 2004