Sanguansak, M., and P. Bhoomkhokrak. “Leadership Characteristic Development Model of Chief Police Station Officers under Provincial Region 3”. Ratchaphruek Journal, vol. 12, no. 2, Aug. 2014, pp. 54-60, https://so05.tci-thaijo.org/index.php/Ratchaphruekjournal/article/view/240624.