Supriatin, T., Trihandayani, Y., Nurhayani, Y. and Rithpho, P. 2022. The Effect of Progressive Muscle Relaxation on Sleep Quality and Anxiety Level of Students Confirmed Covid-19. International Journal of Nursing Information. 1, 2 (Dec. 2022), 7–12. DOI:https://doi.org/10.58418/ijni.v1i2.23.