09:41 10/09/2025
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Nguồn tham khảo
  1. Thensf. (2024, April 24). What is sleep quality? Retrieved from https://www.thensf.org/what-is-sleep-quality/
  2. Suni, E., & Suni, E. (2025, July 22). How to determine poor sleep Quality. Retrieved from https://www.sleepfoundation.org/sleep-hygiene/how-to-determine-poor-quality-sleep
  3. Noyed, D., & Noyed, D. (2025, July 22). How is sleep quality calculated? Retrieved from https://www.sleepfoundation.org/sleep-hygiene/how-is-sleep-quality-calculated
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