Kenny, K., Z. Omar, E. S. Kanavathi, and P. Madhavan. “A Study on the Health Economics of General Practitioners in the Health Care Services in Malaysia: Trends, Challenges and Moving Forward”. International Journal of Public Health Research, vol. 7, no. 1, Apr. 2017, pp. 765-74, https://spaj.ukm.my/ijphr/index.php/ijphr/article/view/72.