Kraithaworn, Phachongchit, Yupapin Sirapo-ngam, Noppawan Piaseu, Dechavudh Nityasuddhi, and Kimberlee A. Gretebeck. 2013. “Factors Predicting Physical Activity Among Older Thais Living in Low Socioeconomic Urban Communities”. Pacific Rim International Journal of Nursing Research 15 (1):39-56. https://he02.tci-thaijo.org/index.php/PRIJNR/article/view/6539.