1. Agung, N. F. A., & Darma, G. S. (2019). Opportunities and challenges of Instagram algorithm in improving competitive advantage. International Journal of Innovative Science and Research Technology, 4(1), 743-747. https://www.ijisrt.com/opportunities-and-challenges-of-instagram-algorithm-in-improving-competitive-advantage
2. Al-Ali, S. (2014). Embracing the selfie craze: Exploring the possible use of Instagram as a language mLearning tool. Issues and Trends in Educational Technology, 2(2), 1-16. https://doi.org/10.2458/azu_itet_v2i2_ai-ali
3. Anggraeni, C. W. (2017). Students’ perspectives toward the use of Instagram in writing class. In A. K. Bin Samahs Khan, I. Yuliasri, C. Swi Ee and D. Darwis (Eds.), 1st ELLiC Proceedings: Innovation, Trends, and
Challenges in English Language Learning in the 21st Century, (pp. 68-74). Semarang, Central Java, Indonesia: Faculty of Foreign Language and Culture Universitas Muhammadiyah Semarang.
https://jurnal.unimus.ac.id/index.php/ELLIC/article/view/2412
Bérard, E. (1991). L'approche communicative: théorie et pratiques. Paris: CLE International.
4. Besse, H., & Porquier, R. (1984). Grammaires et didactique des langues. Paris: Hatier-Crédif.
5. Conseil de l’Europe. (2001). Cadre européen commun de référence pour les langues: apprendre, enseigner, évaluer. Paris: Didier.