“OPTIMALISASI SISTEM WAKTU SERVICE ENGINE DAN P2H PADA ALAT BERAT OHT CAT 777 DI PT. SAPTAINDRA SEJATI SITE ADMO KALIMANTAN SELATAN ”. 2023. Injection: Indonesian Journal of Vocational Mechanical Engineering 3 (2): 52-57. https://doi.org/10.58466/injection.v3i2.1774.