• https://ejurnal.unima.ac.id/https://repository.polytechnic.astra.ac.id/https://www.kar-group.com/https://journal.aisyahuniversity.ac.id/https://osvita.smr.gov.ua/https://jurnal.undhirabali.ac.id/https://fumj.fui.edu.pk/https://ejournal.uki.ac.id/https://murninetsv2.planmalaysia.gov.my/
    • Wakariti Muriuki, Rebecca. “Influence of Professional Development of Mathematics Heads of Departments on Students’ Performance in Public Secondary Schools in Kenya”. KEMI Journal of Educational Leadership and Management , vol. 3, no. 1, June 2024, pp. 169-83, https://journal.kemi.ac.ke/index.php/kjelm/article/view/9.