Asuzu, J. I., and J. N. Okoli. “EFFECTS OF MULTIMEDIA INTEGRATED INSTRUCTION AND DEMONSTRATION METHOD ON SECONDARY SCHOOL STUDENTS ACHIEVEMENT IN ECOLOGICAL CONCEPTS IN UDI EDUCATION ZONE”. UNIZIK Journal of STM Education, vol. 3, no. 1, Dec. 2019, pp. 179-91, https://journals.unizik.edu.ng/jstme/article/view/498.