Wahyuni Allfazmy, P. ., Warlem, N. ., & Amran, R. (2022). Faktor Risiko Penyakit Paru Obstruksi Kronik (PPOK) di Semen Padang Hospital (SPH). Scientific Journal, 1(1), 19–23. https://doi.org/10.56260/sciena.v1i1.18