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Panggabean TAM, Harahap UN, Utama DW. Optimization of Motorcycle Service Operator Performance Using Work Sampling Method at Giant Jaya Motor MSMEs. IRA J.Tek. Mesin Dan Apl [Internet]. 2024 Apr. 30 [cited 2025 Aug. 3];3(1):47-56. Available from: https://www.e-journals.irapublishing.com/index.php/IRAJTMA/article/view/91