BUNGIN, Sarce Sampe; NURSYAM, Nursyam; RATNO, Ratno; YULIANINGSIH , Lilik; SA’PANG, Ariswanto. Linguistic and Non-Linguistic Barriers to Maritime English-Speaking Proficiency: A Qualitative Investigation at Barombong Merchant Marine Polytechnic . ETDC: Indonesian Journal of Research and Educational Review , [S. l.], v. 5, n. 4, p. 2151–2163, 2026. DOI: 10.51574/ijrer.v5i4.5158. Disponível em: https://etdci.org/journal/ijrer/article/view/5158. Acesso em: 3 jul. 2026.