“A Study on the Level of Water Pollution in the Coastal Ecotourism Area of Padang City (Case Study of Bungus Beach, Purus Beach, and Pasir Jambak Beach)”. TOFEDU: The Future of Education Journal 4, no. 8 (November 30, 2025): 4578–4590. Accessed October 9, 2026. https://journal.tofedu.or.id/index.php/journal/article/view/1070.