@unpublished{repository51552,
           title = {E. Filsafat Ilmu},
       publisher = {Universitas Muhammadiyah Prof. Dr. Hamka},
            note = {Unpublished},
             url = {http://repository.uhamka.ac.id/id/eprint/51552/},
          author = {Doni Wahidul Akbar, Doni}
}