Gloria, Ria Yulia, IAIN Postgraduate of Science Education, Indonesia
Gumelar, Agung, University state of Jakarta
Gumilar, Nyi Mas Ayu Ratna, Universitas Negeri Semarang, Indonesia
Gumilar, Surya, Department of Primary Teacher Education, STKIP 11 April, Sumedang, Indonesia
Guntara, Yudi, Physics Education Program, Postgraduate Universitas Negeri Yogyakarta, Indonesia

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