Tulo, A. A., and G. P. Gempes. “The Mediating Effect of Training Perspective on the Relationship Between Competency Potential and Career Progression of Technical Vocational Trainers”. International Journal of Management Excellence (ISSN: 2292-1648), vol. 7, no. 1, Apr. 2016, pp. 751-6, doi:10.17722/ijme.v7i1.845.