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