CHIA, Michael, Serena TAN, Abbie TAN, Soot Mei TAN, and Bervyn LEE. “Weighing in the Issue of Heavy Schoolbags Carried by Pupils in Primary School: 小學生書包的重量: 在新加坡的研究”. Asian Journal of Physical Education & Recreation 9, no. 1 (June 1, 2003): 36–43. Accessed November 6, 2024. https://ejournals.lib.hkbu.edu.hk/index.php/ajper/article/view/1133.