Balami, Y. G. . “Relationship Between Self-Efficacy Belief and Academic Achievement of Distance Learners in National Teachers Institute (NTI) Adamawa State, Nigeria”. International Journal of Education and Practice, vol. 3, no. 2, Nov. 2014, pp. 80-84, doi:10.18488/journal.61/2015.3.2/61.2.80.84.