Aimsitthipan, C., and G. Pookaiyaudom. “MARKETING MIX AFFECTING ON THE DECISION MAKING TO PARTICIPATE IN THE TRIATHLON RACE”. Journal of Sports Science and Health, vol. 22, no. 2, Aug. 2021, pp. 253-66, https://he02.tci-thaijo.org/index.php/spsc_journal/article/view/253212.