Abdurrachman, A, et al. “Pengaruh Latihan Isometrik Terhadap Kemampuan Fungsional Lansia Penderita Osteoarthritis Di Desa Ambokembang”. Prosiding University Research Colloquium, Oct. 2019, pp. 1030-8, https://repository.urecol.org/index.php/proceeding/article/view/761.