Nasution, Hafni Indriati, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan, 20221, Indonesia (Indonesia)
Nasution, Hafni Indriati, Chemistry Department, Faculty of Mathematics and natural Sciences, Universitas Negeri Medan (Indonesia)
Nasution, Hafni Indriati, Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Medan (Indonesia)
Nasution, Hafni Indriati, Universitas Negeri Medan (Indonesia)
Nasution, Hafni Indriati, Billingual Program of Chemistry Depatment, Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan, Jl. Willem iskandar Ps. V, Medan estate, Indonesia. (Indonesia)

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