Nainggolan, Ananda Imanuela, Widyastuti Widyastuti, and Ahmad Ridfah. “Efektivitas Pelatihan Relaksasi Otot Progresif Terhadap Penurunan Kecemasan Primary Caregiver Anak Penderita Leukemia”. Humanitas (Jurnal Psikologi) 4, no. 3 (December 30, 2020): 297–307. Accessed January 7, 2025. http://114.7.153.31/index.php/humanitas/article/view/2526.