Pitipunya, R. (1995) “Determinants of Crop Diversification on Paddy field : A Case Study of Diversification to Vegetables”., Kasetsart Journal of Social Sciences, 16(2), pp. 201–208. available at: https://so04.tci-thaijo.org/index.php/kjss/article/view/243725 (accessed: 16 April 2025).