Kholistiyawatin, N.; Maksum, H. .; Waskito; Purwanto, W. . Development of E-Module Based on Discovery Learning to Improve Students’ Learning Outcomes in PKKR Subject for Grade XI TKRO at State Vocational High School 1 Merbau. jppipa, pendidikan ipa, fisika, biologi, kimia 2023, 9, 12032-12041.