Khamtrong, S. “ourism oute uidelines of ultural ttractions in angkruai istrict, onthaburi rovince”. ournal of umanities and ocial ciences, ajapruk niversity, ol. 7, no. 2, Aug. 2021, pp. 96-109, https://so03.tci-thaijo.org/index.php/rpu/article/view/254777.