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15033016, MAYA MASITHA, S.Pd. (2019) THE EFFECTIVENESS OF USING INSTAGRAM APPLICATION TO IMPROVE STUDENTS WRITING SKILL IN ASKING AND GIVING OPINION AT 11TH GRADE OF SMA NU 1 MODEL SUNGELEBAK IN ACADEMIC YEAR 2018-2019. Skripsi thesis, Universitas Islam Darul Ulum Lamongan.