@unpublished{repository26672,
           title = {Surat Tugas Mengikuti Webinar Analisis Matematika Seri 2 (2023)},
       publisher = {Universita Muhammadiyah Prof.Dr. Hamka},
            note = {Unpublished},
             url = {http://repository.uhamka.ac.id/id/eprint/26672/},
          author = {Ervin, Azhar}
}