R. M. Nawi, M. Abdullah, M. A. B. Setambah, and R. Mustapha, “PEMBANGUNAN MODEL PENGAJARAN USUL AL-FIQH: PENENTUAN KESAHAN KANDUNGAN MELALUI TEKNIK FUZZY DELPHI: DEVELOPMENT OF USUL AL-FIQH TEACHING MODEL: DETERMINING CONTENT VALIDITY THROUGH FUZZY DELPHI TECHNIQUE”, IJMOE, vol. 8, no. 31, pp. 929–946, Sep. 2026.