THIAMWONG, Ladda, Anita L STEWART, and Jarunee WARAHUT. 2011. “Development, Reliability and Validity of the Thai Healthy Aging Survey”. Walailak Journal of Science and Technology (WJST) 6 (2):167-88. https://wjst.wu.ac.th/index.php/wjst/article/view/58.