Muttakim, M. “Frequency of Polypharmacy Use in Geriatric Hypertension Prescriptions for Telkom Retirees at Kimia Farma Kartini Pharmacy, Pematang Siantar”. Jurnal Kesehatan (E-ISSN: 3124-1565), Vol. 1, no. 1, Oct. 2025, pp. 19-22, https://jurnal.univefarina.ac.id/index.php/Jurkes/article/view/154.