Arikpo Sampson Venatius , Aede Hatib Musta’amal , Ogumbe Boniface Ekwok , Alhaji Modu Mustapha. “Interaction of System Approach Model and Lesson Duration, Teachers’ Qualification on Students’ Competence in Technical Skills”. International Journal of Advanced Science and Technology 29, no. 10s (May 10, 2020): 532 - 541. Accessed July 17, 2024. http://sersc.org/journals/index.php/IJAST/article/view/14463.