Hasan H, Maranatha RA. Perubahan Fungsi Paru pada Usia Tua: [Lung Function Alteration in Geriatric Patients]. JR [Internet]. 2017 May 30 [cited 2024 Nov. 26];3(2):52-7. Available from: https://e-journal.unair.ac.id/JR/article/view/12323