Desy Purwati, Sonia Dian Puspita Debataraja, Putri Khumyaroh, Rejeki Sihite, Sudianto Manullang, & Putri Maulidana Fadilah. (2026). Statistical Modeling of the Relationship Between Sleep Quality and Students’ Learning Effectiveness and Concentration Using the Stratified Random Sampling Method. Comprehensive: Jurnal Ilmu Pendidikan Dan Keguruan, 2(5), 366–374. https://doi.org/10.65118/comprehensive.v2i5.58