Dwi Yasa, Arnelia, Denna Delawanti Chrisyarani, Sa’dun Akbar, and Alif Mudiono. 2018. “E-Module Based on Ncesoft Flip Book Maker for Primary School Students”. International Journal of Engineering & Technology 7 (3.4): 286-89. https://doi.org/10.14419/ijet.v7i3.4.19973.