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Rujukan WikiPedia: Google_Classroom https://9to5google.com/2014/08/12/google-classroom... https://www.engadget.com/2017/04/27/googles-classr... https://www.forbes.com/sites/larrymagid/2014/05/06... https://classroom.google.com https://productforums.google.com/d/msg/google-educ... https://www.google.com/edu/products/productivity-t... https://techcrunch.com/2014/05/06/google-debuts-cl... https://techcrunch.com/2015/06/29/google-expands-i... https://techcrunch.com/2017/04/27/google-classroom... https://thenextweb.com/google/2015/08/24/google-cl...
