Idiar, and Muhammad Yunus. “Pengembangan Desain Walker Fleksibel Bagi Lansia”. Jurnal Mesin Nusantara 4, no. 1 (July 20, 2021): 1-10. Accessed November 22, 2024. https://ojs.unpkediri.ac.id/index.php/JMN/article/view/15965.