Dr. Anita Gupta, and Dr. Ravi Kumar Gupta. “DESCRIPTIVE STATISTICS & VAR ESTIMATION: COMPARATIVE ANALYSIS OF STOCK MARKET RETURNS OF USA & ASIAN COUNTRIES”. International Journal of Applied Service Marketing Perspectives, Vol. 9, no. 01, Mar. 2020, pp. 3710-6, https://asmp.gfer.org/index.php/asmp/article/view/39.