Anwar, Rivaldi, Nia Pujiawati, and Mobit Mobit. “The 21st Century Skills in Indonesia Senior High School English Textbook”. Jurnal Ilmiah Wahana Pendidikan 10, no. 3 (February 12, 2024): 755-767. Accessed May 18, 2026. https://jurnal.peneliti.net/index.php/JIWP/article/view/6133.