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Mufliha, D.I.M., Erlangga, E. and Sugiarti, R. 2025. The Effect of Social Support and Self-Efficacy on Academic Procrastination with Smartphone Addiction as an Intervening Variable in Completing Final Students’ Assignments. Ranah Research : Journal of Multidisciplinary Research and Development. 7, 5 (Jun. 2025), 3329-3343. DOI:https://doi.org/10.38035/rrj.v7i5.1630.