Sarkingobir, Yusuf, Syed Abdul Waheed, Marwanu Abubakar, and Nadia Gilani. “Plastic Materials in a Classroom Environment: An Assessment of Nursery Classes in Sokoto State, Nigeria”. Pakistan Journal of Social Sciences 43, no. 2 (June 26, 2023): 217-226. Accessed April 20, 2024. http://pjss.bzu.edu.pk/index.php/pjss/article/view/1224.