Piyathamrongchai, K., P. Rachawong, J. Payakpate, and K. Chaelai. “แผนที่ความสุขชุมชน: กรณีศึกษาจังหวัดพิจิตรและพิษณุโลก: Happiness Map: A Case Study of Phichit and Phitsanulok”. Asian Health, Science and Technology Reports, vol. 20, no. 2, July 2013, pp. 33-44, https://ph03.tci-thaijo.org/index.php/ahstr/article/view/2183.