?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aulast=Muhammad+Hazen+Al+Haytham&rft.au=Muhammad+Hazen+Al+Haytham%2C+-&rft.aufirst=-&rft.degree=S1&rft.inst=Universitas+Pendidikan+Indonesia&rft.date=20+August+2025&rft.title=METODE+GREY-MARKOV+MENGGUNAKAN+M-ESTIMATOR+TUKEY%E2%80%99S+BISQUARE+UNTUK+PERAMALAN+HARGA+SAHAM+BBCA