Retno Indri Yustika. “THE PROMINENT ISSUES OF SECOND LANGUAGE ACQUISITION OF STUDENTS IN ISLAMIC BOARDING SCHOOL AL-ITTIFAQIAH”. Al-Iqtishad: Jurnal Ekonomi Syariah 1, no. 1 (July 4, 2023): 87-99. Accessed May 6, 2026. https://ejournal.iaiqi.ac.id/index.php/aliqtishad/article/view/307.