Arikpo Sampson Venatius , Aede Hatib Musta’amal , Ogumbe Boniface Ekwok , Alhaji Modu Mustapha. 2020. “Interaction of System Approach Model and Lesson Duration, Teachers’ Qualification on Students’ Competence in Technical Skills”. International Journal of Advanced Science and Technology 29 (10s), 532 -41. http://sersc.org/journals/index.php/IJAST/article/view/14463.