Samah, R., R. Kamaruddin, and L. H. Eam. “Efficiency Analysis of Pond Fish Culture System in Negeri Kedah and Pulau Pinang: Data Envelopment Analysis Approach”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 27, no. 1, May 2016, pp. 154-66, https://gssrr.org/index.php/JournalOfBasicAndApplied/article/view/5669.