Siman, Keysar Panjaitan, Selamat Riadi, and Budi Harto. 2022. “DEVELOPMENT OF HYDRAULIC COURSE E-MODULES TO INCREASE STUDENTS’ LEARNING INTEREST MECHANICAL ENGINEERING EDUCATION”. International Journal of Innovative Technologies in Social Science, no. 4(36) (December). https://doi.org/10.31435/rsglobal_ijitss/30122022/7932.