Indriani, F., P. Pawito, and E. P. Pamungkasari. “Do Primary Schools Have Contextual Influence on Health Behavior? A Multilevel Evidence from Nganjuk, East Java”. Journal of Health Promotion and Behavior, vol. 4, no. 3, July 2019, pp. 235-4, https://thejhpb.com/index.php/thejhpb/article/view/220.