@book{repository1239,
            year = {2020},
       publisher = {EduCenter Indonesia},
           title = {Desain Pembelajaran IPA SD},
           month = {January},
             url = {http://repository.uhamka.ac.id/id/eprint/1239/},
            isbn = {9786025282379},
          author = {Yusuf, Yusnidar}
}