K. Kuperan Viswanathan, Sabirah Sulaiman, Lim Hock Eam,. 2019. «Improving Livelihood Options via Agriculture: A Case Study of Social Entrepreneurship, Kedah». Opción 35 (agosto), 1340-55. https://produccioncientificaluz.org/index.php/opcion/article/view/24586.