KAEWDEE, W., K. THIRAKHUPT, and S. TUNHIKORN. “Population of Waterbirds in the Breeding Colony at Khuan Khi Sian, Thailand’s First Ramsar Site”. Tropical Natural History, vol. 2, no. 1, Feb. 2002, pp. 51-58, https://li01.tci-thaijo.org/index.php/tnh/article/view/102865.