Gaya APA
El, B, , A., der, P, , A, V. (1997).
Poultry Feed from Waste :Processing and Use .
London:
Chapman and hall.
Gaya MLA
El, Boushy, , A.R.Y.., der, Poel, , A.F.B, Van.
"Poultry Feed from Waste :Processing and Use".
London:
Chapman and hall,
1997.
Text.