?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=Yelda%2C+Yelda&rft.aulast=Yelda&rft.aufirst=Yelda&rft.title=Peramalan+Kurs+Rupiah+terhadap+Dolar+Amerika+Menggunakan+Metode+Fuzzy+Time+Series+Cheng&rft.inst=Universitas+Negeri+Padang&rft.date=February+2026&rft.degree=Diploma%2FTugas+Akhir