The Effect of Using Smartphone toward The Quality of Sleep and the Impact on Learning Motivation Students
Introduction: Nowadays, using smartphone not only used to call and send a short message but used as tools multifunction such as browser, chatting, game, social media, and others. The using unlimited smartphone that caused by irregular sleep. Students who experienced poor quality of sleep will be inf...
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Universitas Muhammadiyah Malang,
2020-07-01T00:00:00Z.
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