Wahyuningsih, Sungkawati Kardi. “DEVELOPING EXTENSIVE READING MATERIAL FOR SEMESTER 2 STUDENTS OF YOGYAKARTA UNIVERSITY OF TECHNOLOGY”. Jurnal As-Salam 2, no. 3 (December 31, 2018): 118–122. Accessed September 14, 2025. https://jurnal-assalam.org/index.php/JAS/article/view/107.