Tubosun, Babalola Victor, and Hafsatu Abdullahi Umar (PhD). 2015. “APPLICATION OF EPISTEMOLOGICAL CODE METHODS TO TEACHING AND LEARNING OF CHEMISTRY IN NIGERIAN SECONDARY SCHOOLS”. Singaporean Journal of Business Economics and Management 4 ((8):35-48. https://www.singaporeanjbem.com/index.php/SJBEM/article/view/532.