Desy Purwati, Sonia Dian Puspita Debataraja, Putri Khumyaroh, Rejeki Sihite, Sudianto Manullang, Putri Maulidana Fadilah. Statistical Modeling of the Relationship Between Sleep Quality and Students’ Learning Effectiveness and Concentration Using the Stratified Random Sampling Method. comprehensive [Internet]. 2026 Nov. 11 [cited 2026 Nov. 12];2(5):366-74. Available from: https://comprehensive.presisipustaka.co.id/index.php/i/article/view/58