BEATRIKSAN, Y.; PURBA, D.; WIBOWO, C. Analisa kerja katup API 6A dan Pengembangan Metode Perbaikan Dibengkel Perbaikan CV.PUTRA TEKNIK SEJAHTERA. Engineering and Technology International Journal, [S. l.], v. 5, n. 02, p. 144–153, 2023. DOI: 10.55642/eatij.v5i02.350. Disponível em: https://mand-ycmm.org/index.php/eatij/article/view/350. Acesso em: 5 aug. 2026.