1. Schwab, Klaus. The Fourth Industrial Revolution: What It Means and How to Respond. World Economic Forum. (2016).
2. Afrianto. Being a Professional Teacher in the Era of Industrial Revolution 4.0: Opportunities, Challenges and Strategies for Innovative Classroom Practices. English Language Teaching and Research. Vol. 2 (1), (2018).
3. Sani, R.A. Pembelajaran Saintifik Untuk Implementasi Kurikulum 2013. In Y.S. Hayati (Ed), Pembelajaran saintifik untuk implementasi kurikulum 2013. Bumi Aksara. (2014).
4. Trilling, Bernie and Fadel, Charles. 21st Century Skills: Learning for Life in Our Times. John Wiley & Sons, 978-0-47-055362-6. (2009).
5. Husamah. Pembelajaran Bauran (Blended Learning). Prestasi Pustaka Jaya, Jakarta (2014).