Kano, D. D., D. K. Ayana, and D. B. Debelo. “The Practices of Instructional Supervisions in Supplementing Holistic Teaching-Learning Process: Qersa and Omo Nada Woreda Secondary Schools of Jimma Zone in Focus”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 36, no. 3, Oct. 2017, pp. 1-19, https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/7281.