Bhargava, M. ., J. . Semwal, R. . Juyal, S. . Vyas, and D. . Varshney. “Assessment Of Personality Types in An Urban Community of District Dehradun, Uttarakhand Using Introversion- Extroversion Inventory”. National Journal of Community Medicine, vol. 6, no. 04, Dec. 2015, pp. 466-8, https://njcmindia.com/index.php/file/article/view/1242.