Susilawati, S., and M. . Batubara. “ANALISIS FAKTOR YANG MEMPENGARUHI KELELAHAN PADA PEKERJA DRIVER GRAB KOTA MEDAN”. ZAHRA: JOURNAL OF HEALTH AND MEDICAL RESEARCH, vol. 3, no. 4, June 2023, pp. 329-36, https://www.adisampublisher.org/index.php/aisha/article/view/386.