AMALIARRAFIUN, Putri Nurmeiga; HASTINI; MAF’ULAH, Maf’ulah; ZARKIANI. Investigating EFL Students’ Difficulties in Producing English Interdental Fricatives (/?/ and /Ð/): A Descriptive Quantitative Study. FOSTER: Journal of English Language Teaching, [S. l.], v. 7, n. 2, p. 547–561, 2026. DOI: 10.24256/foster-jelt.v7i2.412. Disponível em: https://foster.pbi-iainpalopo.ac.id/index.php/contents/article/view/412. Acesso em: 14 oct. 2026.