Hasibuan A, Ekalestari S, Rahman Suleman A, Khadijatul Z Harahap A, Hasibuan M, Simarmata J, et al. Optimization Manufacturing System Model with Recycling Oriented. IJET [Internet]. 2018 Jul. 7 [cited 2024 Nov. 23];7(3.5):112-5. Available from: https://sciencepubco.com/index.php/ijet/article/view/21664