อุตสาหะ เ. (2018). A Study of Costs and Profits of Agriculturists’ Pineapple Plantation in Ban Du Sub-District, Muang District, Chiangrai Province. Journal of Management Science Chiangrai Rajabhat University, 7(2), 104–122. Retrieved from https://so03.tci-thaijo.org/index.php/jmscrru/article/view/127178