@unpublished{repository27606,
         journal = {The effect of using google classroom on students' mastery of  physics concepts through the discovery learning model},
            note = {Unpublished},
           title = {The effect of using google classroom on students' mastery of 
physics concepts through the discovery learning model},
             url = {http://repository.uhamka.ac.id/id/eprint/27606/},
          author = {Laksanawati, Wahyu Dian}
}