Anak Kemarau, Ricky, and Oliver Valentine Eboy. “Application of Remote Sensing on El Niño Extreme Effect in Normalized Difference Vegetation Index (NDVI) and Normalized Difference Water Index (NDWI)”. Malaysian Journal of Applied Sciences 6, no. 1 (April 30, 2021): 46-56. Accessed May 16, 2022. https://journal.unisza.edu.my/myjas/index.php/myjas/article/view/277.