PROFILE OF POSITIVE AND NEGATIVE IMPACT OF HANDPHONE USAGE ON CLASS X STUDENTS IN SMA NEGERI 12 PEKANBARU

1 1 PROFILE OF POSITIVE AND NEGATIVE IMPACT OF HANDPHONE USAGE ON CLASS X STUDENTS IN SMA NEGERI 12 PEKANBARU Resmita Widya Ningsihˡ, Elni Yakub 2, Ra...
Author:  Yanti Hermanto

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