R. F. Lestari, E. Wisanti, y L. T. Rahayu, «The Effectiveness of Laughter Therapy by Using Wayang Kulit (Shadow Puppets) Video Media to Reduce Elderly Anxiety During The COVID-19 Pandemic», Gac Méd Caracas, vol. 130, n.º 1 S, pp. S271-S275, jun. 2022.