Samah R, Kamaruddin R, Eam LH. Efficiency Analysis of Pond Fish Culture System in Negeri Kedah and Pulau Pinang: Data Envelopment Analysis Approach. IJSBAR. 2016;27(1):154-166. Accessed April 29, 2026. https://gssrr.org/JournalOfBasicAndApplied/article/view/5669