Nurhayani, Sinaga, R. M., & Pujiati. (2024). Analysis of "Productive and Educative" Performance in the Lesson Studies of the Center of Excellence SMK (Study at State Vocational High School 4 Bandar Lampung). International Journal of Educational and Life Sciences, 2(1), 69–82. https://doi.org/10.59890/ijels.v2i1.1169