[1]
Malik, A.A. et al. 2018. Construct validity and factor structure of the Pittsburgh Sleep Quality Index (PSQI) among physicians in Jeddah, Kingdom of Saudi Arabia. Pakistan Journal of Statistics and Operation Research. 14, 4 (Dec. 2018), 935–943. DOI:https://doi.org/10.18187/pjsor.v14i4.2729.