Melese, Fekadu, Adugna Bersissa, and Dinka Yadeta. 2020. “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 9 (1):51-62. https://doi.org/10.20372/star.v9i1.04.