Aryal, M., J. P. Dutta, P. P. Regmi, and K. R. Pandey. “Willingness to Pay by Using Travel Cost Method in Chitwan National Park, Nepal”. Journal of the Institute of Agriculture and Animal Science 33 (August 10, 2018): 1–10. Accessed May 1, 2024. https://www.nepjol.info/index.php/JIAAS/article/view/20676.