Adeola, 2003. Int. J. Poult. Sci., 2 (5): 318-323 Document reference Adeola, O., 2003. Energy values of feed ingredients for White Pekin ducks. Int. J. Poult. Sci., 2 (5): 318-323Web http://dx.doi.org/10.3923/ijps.2003.318.323Citation key Adeola, 2003