Pandu Dwipatmasari, and Irfan Hamdani. “The Relationship Between Backpack Use and Low Back Pain Complaints in Grade VIII Students of Muhammadiyah 1 Middle School, Medan”. Educare: Journal Educational and Multimedia, vol. 4, no. 02, Sept. 2026, pp. 132-40, https://seaninstitute.or.id/bersinar/index.php/ducare/article/view/274.