@unpublished{repository33487,
            note = {Unpublished},
         journal = {The Effect of Character-Based Teaching Flipbook Media on The Results of Calculus Learning},
           title = {The Effect of Character-Based Teaching Flipbook
Media on The Results of Calculus Learning},
             url = {http://repository.uhamka.ac.id/id/eprint/33487/},
          author = {Imas Ratna Ermawati, IRE}
}