., S., Indrianti, Y., Ghadati Rabiha, S., Anindyo Widhoyoko, S., & Rosyidi, U. (2018). Development of the Indonesian Teacher Engagement Index (ITEI) Apps Model without the Internet. International Journal of Engineering and Technology, 7(3.30), 256-258. https://doi.org/10.14419/ijet.v7i3.30.18252