Salman Khan, Wazim Khan, and Muhammad Ayaz. “An Evaluative Study of Practice of Stimulus Variation Skill of Secondary School Teachers in Khyber Pakhtunkhwa, Pakistan”. sjesr 3, no. 4 (December 25, 2020): 54-61. Accessed May 8, 2026. https://www.sjesr.org.pk/ojs/index.php/ojs/article/view/442.