Naryaning, R. and Katmini, K. 2021. Determinants of Using Gadget to Concentration, Complaints of Eye Fatigue and Student Learning Motivation at SMKN 7 Malang. Journal for Quality in Public Health. 5, 1 (Nov. 2021), 142–148. DOI:https://doi.org/10.30994/jqph.v5i1.230.