LIANDRA KHAIRUNNISA; HAFIZ NURDIANSYAH. THE EFFECT OF THE APPLICATION OF POSITIVE PSYCHOLOGY ON THE DEVELOPMENT OF HUMAN RESOURCE PERFORMANCE AT PT MANDIRI ABADI PERMAI KOTA MEDAN. MEDALION JOURNAL: Medical Research, Nursing, Health and Midwife Participation, [S. l.], v. 6, n. 2, p. 238–245, 2025. DOI: 10.59733/medalion.v6i2.204. Disponível em: https://medalionjournal.com/index.php/go/article/view/204. Acesso em: 30 sep. 2025.