Sinambela YF, Asriwandari H. Informal Economic Activities of the Elderly in Pekanbaru City. Jurnal Multidisiplin Indonesia [Internet]. 2024 Jun. 1 [cited 2026 Jul. 6];3(1):809-17. Available from: https://rayyanjurnal.com/index.php/qistina/article/view/2427