M. Hudzari, R., W. Aimrun, M.A. H.A. Ssomad, and M. S. Norazean. 2013. “Application of Geographical Information System for Farm Mechanization Education and Training”. Pure and Applied Science Advances 2 (4):196-203. http://www.sjournals.com/index.php/sjpas/article/view/983.