Muhammad Nurullah Waliyullah Mohamed Nazli, Irneza Ismail, and Fatin Hamimi Mustafa. “DESIGN CONCEPT: PORTABLE SPECTROSCOPY USING OPTICAL LIGHT PROPAGATION FOR RAPID LIQUID-BASED SENSING APPLICATION”. INTERNATIONAL JOURNAL OF INNOVATION AND INDUSTRIAL REVOLUTION (IJIREV) 7, no. 20 (March 2, 2025). Accessed August 23, 2025. https://gaexcellence.com/ijirev/article/view/4801.