ปัญญายง ท. “Electronic Lesson Development: Mathematics for ‘Long Lap Lae’ Durian Agricultural business in Uttradit Province: A Case Study of Moderate Class-More Knowledge Policy in Schools”. Ratchaphruek Journal, vol. 16, no. 1, Apr. 2018, pp. 30-36, https://so05.tci-thaijo.org/index.php/Ratchaphruekjournal/article/view/125218.