Tesana, S., C. Semakhun, and W. Inthong. “The Development of the Integrated Learning Instructional Model Based on Agriculture to Develop the Agricultural Profession Skill for Up-Country Secondary School Students in the Lower-Northern Part of Thailand”. Humanities and Social Sciences Journal of Pibulsongkram Rajabhat University, vol. 12, no. 1, Aug. 2017, pp. 145-62, https://so01.tci-thaijo.org/index.php/GraduatePSRU/article/view/87602.