Sunaryo S, Riyanta W, Arifianto TA. Penerapan Metode Research and Development Untuk Pengembangan Sumber Belajar Digital (Open Course Ware) di Politeknik Perkeretaapian Indonesia Madiun. j.ilm.intech [Internet]. 2022 Dec. 12 [cited 2024 Apr. 28];4(02):246-54. Available from: https://jurnal.umus.ac.id/index.php/intech/article/view/867