แคนยุกต์ ณัฐชา. 2015. “Guideline for Petch Sai Rung’Rose Apple Development of Farmers in Phetchaburi Province”. Journal of Humanities and Social Sciences, Rajapruk University 1 (2):81-92. https://so03.tci-thaijo.org/index.php/rpu/article/view/112354.