Chayakornsopit, P. “The Impact of Consumption, Saving and Investment in the Northeast on the National Income of Thailand”. Rajamangala University of Technology Tawan-Ok Social Science Journal, vol. 9, no. 2, Dec. 2020, pp. 70-76, https://so05.tci-thaijo.org/index.php/SocialJournal2rmutto/article/view/248527.