Abdullah, Najjah Safea, and Zaliza Azan. “Sustaining Local Eco-Friendly Tourism in Batang Kali: An Economic Perspective”. Jurnal Evolusi 3, no. 1 (November 29, 2022). Accessed October 11, 2025. https://journal.uptm.edu.my/index.php/evolusi/article/view/169.