Sudhin, Serah (September 2017). "The Journey of Nifty-Fifty"(PDF). International Journal of Academic Research and Development. 2 (5): 4. ISSN2455-4197. Archived from the original(PDF) on 7 January 2021. Retrieved 6 January 2021.
Sudhin, Serah (September 2017). "The Journey of Nifty-Fifty"(PDF). International Journal of Academic Research and Development. 2 (5): 4. ISSN2455-4197. Archived from the original(PDF) on 7 January 2021. Retrieved 6 January 2021.
Sudhin, Serah (September 2017). "The Journey of Nifty-Fifty"(PDF). International Journal of Academic Research and Development. 2 (5): 4. ISSN2455-4197. Archived from the original(PDF) on 7 January 2021. Retrieved 6 January 2021.