P.W., Waldroup, C.A. Fritts, J.H. Kersey, E.A. Saleh, B.J. Kerr, and M.T. Kidd. 2002. “Evaluation of Crude Protein Needs for Large White Male Turkeys from 16 to 20 Weeks of Age”. International Journal of Poultry Science 2 (1): 15–18. https://doi.org/10.3923/ijps.2003.15.18.