เพ็งสุข ฐาปนี. “The Information Development of The Buddha’s Footprint Heritage Tourism-route by the Google API. Case Study: Bua-Bok Buddha’s Footprint in Udon Thani”. Journal of Humanities and Social Sciences, Rajapruk University 4, no. 2 (September 30, 2018): 52–63. accessed September 10, 2026. https://so03.tci-thaijo.org/index.php/rpu/article/view/144173.