Phakamach, V. “The Enhancement of Production Capability of Sandalwood Flower Group, Ban Non-Sa-at in Phetchabun Province”. Journal of Humanities and Social Sciences, Rajapruk University, vol. 9, no. 1, Apr. 2023, pp. 341-54, https://so03.tci-thaijo.org/index.php/rpu/article/view/267861.