Van Phuoc T, Xuan Dung N N, Huu Manh L and Vinh Tu N N 2019: Effect of dietary Turmeric (Curcuma longa) extract powder on productive performance and egg quality of black-bone chicken (Ac chicken). Livestock Research for Rural Development. Volume 31, Article #23. Retrieved , from http://www.lrrd.org/lrrd31/2/truong31023.html