Haque, M., K. Soonthorndhada, P. Hunchangsith, and M. Kanchanachitra. “Active Ageing Level in Thailand: A Comparison Between Female and Male Elderly”. Journal of Health Research, vol. 30, no. 2, Feb. 2017, pp. 99-107, https://he01.tci-thaijo.org/index.php/jhealthres/article/view/77895.