Yeamkong, suphawadee, T. N. Ngoc, P. Kotom, P. Jaipong, P. Noinumsai, S. Yaemkong, and P. Seema. “The Study on Farmers’ Knowledge and Behavior in Using of Chemicals for Protection and Pest Elimination in Pho Thale Sub-District, Pho Thale District, Phichit Province”. Humanities and Social Sciences Journal of Pibulsongkram Rajabhat University, vol. 12, no. 2, Jan. 2018, pp. 444-5, https://so01.tci-thaijo.org/index.php/GraduatePSRU/article/view/104645.