ERVIL, R.; RHAMADAN, D. Y. Productivity analysis using method Murvin E. Mundel case study PT. Johan Sentosa. Jurnal Pendidikan Teknologi Kejuruan, Padang, Indonesia, v. 4, n. 4, p. 107–110, 2021. DOI: 10.24036/jptk.v4i4.21523. Disponível em: https://jptk.ppj.unp.ac.id/index.php/jptk/article/view/215. Acesso em: 13 mar. 2025.