ทองวัตรภ., and กิจธีระวุฒิวงษ์น. “Factors Predicting Physical Activity Behaviors Among Grade 4-6 Students in Nongkula Sub-District, Bang Rakam District, Phitsanulok Provinc”. Nursing Journal of The Ministry of Public Health, Vol. 29, no. 2, Aug. 2019, pp. 24-36, https://he02.tci-thaijo.org/index.php/tnaph/article/view/213519.