Al-Mayah, Ali A.S. “Immune Response of Broiler Chicks to DL-Methionine Supplementation at Different Ages”. International Journal of Poultry Science 5, no. 2 (January 15, 2006): 169–172. Accessed September 22, 2025. https://ijpsjournal.org/index.php/ijps/article/view/505.