Muhammad Ramadhan, (Sinta Id: 6675921; Scopus Id: 57194019617; Google Scholar Id: CRjbWwwAAAAJ). State Islamic University of North Sumatra (UIN Sumatera Utara) Medan, Indonesia

James Penner, (Scopus Id: 7102604260; Google Scholar Id: 2uLMAAAAJ). National University of Singapore, Singapore