M. K. . Akhmadi and M. K. . Usman, “Parallelism of Pertalite Fuel Consumption With 3 Kg LPG Gas Fuel On a Starke Gwp50 Water Pump Gasoline Engine”, IRA J.Tek. Mesin Dan Apl, vol. 2, no. 3, pp. 64–73, Dec. 2023.