Dr. Haba Abdelmalek. “Psychological Harmony Among Pre-School Students (A Field Study on a Sample of Pre-School Section Children in El-Oued Municipality)”. Pegem Journal of Education and Instruction, vol. 15, no. 4, Dec. 2025, pp. 2965-74, https://www.pegegog.net/index.php/pegegog/article/view/4485.