AL-Beitawi, N., and S.S. El-Ghousein. 2008. “Effect of Feeding Different Levels of Nigella Sativa Seeds (Black Cumin) on Performance, Blood Constituents and Carcass Characteristics of Broiler Chicks ”. International Journal of Poultry Science 7 (7): 715–721. https://doi.org/10.3923/ijps.2008.715.721.