Indiyanti, Ryzka. “eturn n sset (Roa) nalysis sing u ont ystem ethod n T. ltrajaya ilk ndustry nd rading ompany Tbk” (2015-2018 eriod)”. IJIEEB International Journal of Integrated Education, Engineering and Business eISSN 2615-1596 pISSN 2615-2312 3, no. 2 (September 30, 2020): 94 - 103. ccessed December 5, 2024. https://jurnal.narotama.ac.id/index.php/ijieeb/article/view/1170.