Alade , Ibiwumi A., and Adebowale A. Ojo. “ Emerging Cross-Curricular Diversification and Implementation in Educational Institutions for Sustainable Development: Teacher Educators’ Perspectives in Ogun State of Nigeria ”. African Journal of Education,Science and Technology (AJEST), vol. 4, no. 4, Dec. 2018, pp. pp 199-200, http://ajest.org/index.php/ajest/article/view/715.