Ningtias, D. R., B. Wahyudi, and I. Firdaus. “Rancang Bangun Water Seal Drainage (WSD) Khusus Thorax”. Jurnal Teori Dan Aplikasi Fisika, vol. 8, no. 2, July 2020, pp. 169-74, doi:10.23960/jtaf.v8i2.254.