@unpublished{repository36092,
            year = {2024},
            note = {Unpublished},
           title = {BAP Teknik Echo 1},
       publisher = {Universitas Muhammadiyah Prof. DR. HAMKA},
             url = {http://repository.uhamka.ac.id/id/eprint/36092/},
          author = {Erlina Pudyastuti, Erlina}
}