พันธุ์วัฒนา พิชศาล. “The Five Freedoms: Factors Affacting of Red - Whiskered Bulbul Birdmen in Habitat”. Parichart Journal 30, no. 2 (December 7, 2017): 275–294. accessed September 12, 2026. https://so05.tci-thaijo.org/index.php/parichartjournal/article/view/105051.