1. Administration Report of the Sikkim State for 1917–18.
2. “Circular no. 8545/G of 16 October 1924.” Sikkim Code Vol. 4. Gangtok: Government of Sikkim, undated: 1.
3. National archives of India, file no. “33/8/56-F. II (9C), Sikkim Nationality Law – Position under Citizenship Act.” 1955. http://www.abhilekh-patal.in