Jayasudha, A., et al. “Effectiveness of Peanut Ball On Outcome of First Stage of Labour Among Primi Mothers in Selected Tertiary Care Hospital, Coimbatore”. International Journal of Research in Engineering, Science and Management, vol. 4, no. 3, Mar. 2021, pp. 73-75, https://journal.ijresm.com/index.php/ijresm/article/view/566.