Melese, F., A. Bersissa, and D. Yadeta. “Perceived Leadership, Academic Self-Efficacy and Achievement Motivation As Predictors of Academic Achievement Among Preparatory School Students of East Wollega Zone”. Journal of Science, Technology and Arts Research, vol. 9, no. 1, Mar. 2020, pp. 51-62, doi:10.20372/star.v9i1.04.