Tefera, B., A. Ahemed, and M. Fentahun. “Self-Regulatory Behavior of Adolescent Students in Ethiopia –The Case of Ayer Tena High School, Kolfe Keranio Sub City, Addis Ababa, Ethiopia”. Science, Technology and Arts Research Journal, vol. 3, no. 4, Dec. 2014, pp. 172-8, https://journals.wgu.edu.et/index.php/star/article/view/543.