Salleh, Wan Nasriha Wan Mohamed, and Che Nidzam Che Ahmad. “Design for BIO4GS Module’s Element Based on Experts’ Consensus: Fuzzy Delphi Method Application”. CENTRAL ASIA AND THE CAUCASUS, vol. 23, no. 1, Jan. 2022, pp. 1803-17, http://13.200.237.241/CAC/index.php/cac/article/view/252.