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		Danang Setyadi
								
Department of Mathematics Education, Universitas Kristen Satya Wacana		
Indonesia	
		Robert Harry Soesanto
								
Department of Mathematics Education, Universitas Pelita Harapan		
Indonesia	
		Dylmoon Hidayat
								
Master Program of Educational Technology, Universitas Pelita Harapan		
Indonesia	
		Wilfridus Beda Nuba Dosinaeng
								
Department of Mathematics Education, Universitas Katolik Widya Mandira.
Doctor of Philosophy, School of Education, University of Queensland		
Australia	
		Helti Lygia Mampouw
								
Department of Mathematics Education, Universitas Kristen Satya Wacana		
Indonesia	
