Gaya, Neromel Martija Epekto ng smartphones, tablets, at laptops/PC sa pag-aaral ng mga mag-aaral ng SHS ng Our Lady of Perptual Succor College - Marikina City March 2017 - 50 pages, colored, illustrations, 28cm Subjects--Topical Terms: Research--SHS Thesis LC Class. No.: TK 7880 E63g / 2017