พันธุ์วัฒนา พิชศาล. “The People’s Attitude towards the Red-Whiskered Bulbul Caretakers Living Near Ramkhamhaeng Zone”. Journal of Humanities and Social Sciences, Rajapruk University 3, no. 1 (May 31, 2017): 83–94. Accessed April 28, 2024. https://so03.tci-thaijo.org/index.php/rpu/article/view/112554.