Retno Indri Yustika. THE PROMINENT ISSUES OF SECOND LANGUAGE ACQUISITION OF STUDENTS IN ISLAMIC BOARDING SCHOOL AL-ITTIFAQIAH. Al-Iqtishad [Internet]. 2023 Jul. 4 [cited 2026 Jun. 30];1(1):87-99. Available from: https://e-journal.uqi.ac.id/index.php/aliqtishad/article/view/307