Try Julita Sembiring, E., N. Atsirina Khrisnaputri, and P. Haditua Reyner Siregar. “Testing the Performance of a Water Restrictor With the Orifice Principle”. KnE Social Sciences, Vol. 7, no. 16, Oct. 2022, pp. 29–37, doi:10.18502/kss.v7i16.12150.