Lestari, D. D., I. Iskandar, and W. Wendi. “ANALYSIS THE EFFICIENCY OF BOILER 2011 UA WATER TUBE TYPE AT PT PERTAMINA RU III (PERSERO) PLAJU”. International Journal of Social Science, vol. 2, no. 4, Dec. 2022, pp. 1865-72, doi:10.53625/ijss.v2i4.4164.