@unpublished{repository40080,
            note = {Unpublished},
           title = {ARTIKEL\_The effectiveness of the ring electromagnetic accelerator on students' understanding of the Lorentz force concept based on prophecy},
       publisher = {uhamka},
             url = {http://repository.uhamka.ac.id/id/eprint/40080/},
          author = {Imas Ratna Ermawati, IRE}
}