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Yogi Pratama A, Farida Tantiani F. Differences in Hardiness Between 8th Grade Students of Superior and Regular Class in SMPN 1 Ngunut Tulungagung. KSS [Internet]. 2022Jan.28 [cited 2024Jul.17];7(1):99–108. Available from: https://knepublishing.com/index.php/KnE-Social/article/view/10204